Merge remote-tracking branch 'qatar/master'

* qatar/master: (22 commits)
  arm: remove disabled function dct_unquantize_h263_inter_iwmmxt()
  Remove commented-out call to non-existing function print_pow1().
  Do not decode RV30 files if the extradata is too small
  flashsv: split flashsv_decode_block() off from flashsv_decode_frame().
  ppc: remove disabled code
  libspeexdec: Drop const qualifier to silence compiler warning.
  libopenjpeg: Drop const qualifier to silence compiler warning.
  alac: Remove unused dummy code.
  Remove unused structs and tables.
  vaapi: do not assert on value read from input bitstream
  flashsvenc: replace bitstream description by a link to the specification
  flashsvenc: drop unnecessary cast
  flashsvenc: improve some variable names and fix corresponding comments
  flashsvenc: merge two consecutive if-conditions
  flashsvenc: merge variable declarations and initializations
  flashsvenc: convert some debug av_log() to av_dlog()
  flashsvenc: whitespace cosmetics
  flashsvenc: drop some unnecessary parentheses
  flashsvenc: fix some comment typos
  aacps: skip some memcpy() if src and dst would be equal
  ...

Conflicts:
	libavcodec/vaapi_mpeg2.c
	libavformat/aviobuf.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/aacps.c

@@ -813,6 +813,7 @@ static void stereo_processing(PSContext *ps, float (*l)[32][2], float (*r)[32][2
     const float (*H_LUT)[8][4] = (PS_BASELINE || ps->icc_mode < 3) ? HA : HB;
 
     //Remapping
+    if (ps->num_env_old) {
         memcpy(H11[0][0], H11[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H11[0][0][0]));
         memcpy(H11[1][0], H11[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H11[1][0][0]));
         memcpy(H12[0][0], H12[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H12[0][0][0]));
@@ -821,6 +822,8 @@ static void stereo_processing(PSContext *ps, float (*l)[32][2], float (*r)[32][2
         memcpy(H21[1][0], H21[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H21[1][0][0]));
         memcpy(H22[0][0], H22[0][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H22[0][0][0]));
         memcpy(H22[1][0], H22[1][ps->num_env_old], PS_MAX_NR_IIDICC*sizeof(H22[1][0][0]));
+    }
+
     if (is34) {
         remap34(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1);
         remap34(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1);

libavcodec/alac.c

@@ -284,20 +284,9 @@ static void predictor_decompress_fir_adapt(int32_t *error_buffer,
             buffer_out[i+1] = val;
         }
 
-#if 0
     /* 4 and 8 are very common cases (the only ones i've seen). these
      * should be unrolled and optimized
      */
-    if (predictor_coef_num == 4) {
-        /* FIXME: optimized general case */
-        return;
-    }
-
-    if (predictor_coef_table == 8) {
-        /* FIXME: optimized general case */
-        return;
-    }
-#endif
 
     /* general case */
     if (predictor_coef_num > 0) {

libavcodec/arm/mpegvideo_iwmmxt.c

@@ -93,29 +93,9 @@ static void dct_unquantize_h263_intra_iwmmxt(MpegEncContext *s,
     block_orig[0] = level;
 }
 
-#if 0
-static void dct_unquantize_h263_inter_iwmmxt(MpegEncContext *s,
-                                             DCTELEM *block, int n, int qscale)
-{
-    int nCoeffs;
-
-    assert(s->block_last_index[n]>=0);
-
-    if(s->ac_pred)
-        nCoeffs=63;
-    else
-        nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
-
-    ippiQuantInvInter_Compact_H263_16s_I(block, nCoeffs+1, qscale);
-}
-#endif
-
 void MPV_common_init_iwmmxt(MpegEncContext *s)
 {
     if (!(mm_flags & AV_CPU_FLAG_IWMMXT)) return;
 
     s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_iwmmxt;
-#if 0
-    s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_iwmmxt;
-#endif
 }

libavcodec/cabac.c

@@ -75,18 +75,7 @@ static const uint8_t lps_state[64]= {
  33,33,34,34,35,35,35,36,
  36,36,37,37,37,38,38,63,
 };
-#if 0
-const uint8_t ff_h264_norm_shift_old[128]= {
- 7,6,5,5,4,4,4,4,3,3,3,3,3,3,3,3,
- 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
- 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
- 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-};
-#endif
+
 const uint8_t ff_h264_norm_shift[512]= {
  9,8,7,7,6,6,6,6,5,5,5,5,5,5,5,5,
  4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,

libavcodec/flashsv.c

@@ -71,6 +71,45 @@ static av_cold int flashsv_decode_init(AVCodecContext *avctx)
 }
 
 
+static int flashsv_decode_block(AVCodecContext *avctx, AVPacket *avpkt,
+                                GetBitContext *gb, int block_size,
+                                int width, int height, int x_pos, int y_pos)
+{
+    struct FlashSVContext *s = avctx->priv_data;
+    uint8_t *line = s->tmpblock;
+    int k;
+    int ret = inflateReset(&s->zstream);
+    if (ret != Z_OK) {
+        //return -1;
+    }
+    s->zstream.next_in   = avpkt->data + get_bits_count(gb) / 8;
+    s->zstream.avail_in  = block_size;
+    s->zstream.next_out  = s->tmpblock;
+    s->zstream.avail_out = s->block_size * 3;
+    ret = inflate(&s->zstream, Z_FINISH);
+    if (ret == Z_DATA_ERROR) {
+        av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n");
+        inflateSync(&s->zstream);
+        ret = inflate(&s->zstream, Z_FINISH);
+    }
+
+    if (ret != Z_OK && ret != Z_STREAM_END) {
+        //return -1;
+    }
+    /* Flash Screen Video stores the image upside down, so copy
+     * lines to destination in reverse order. */
+    for (k = 1; k <= height; k++) {
+        memcpy(s->frame.data[0] + x_pos * 3 +
+               (s->image_height - y_pos - k) * s->frame.linesize[0],
+               line, width * 3);
+        /* advance source pointer to next line */
+        line += width * 3;
+    }
+    skip_bits_long(gb, 8 * block_size); /* skip the consumed bits */
+    return 0;
+}
+
+
 static int flashsv_decode_frame(AVCodecContext *avctx, void *data,
                                 int *data_size, AVPacket *avpkt)
 {
@@ -159,41 +198,11 @@ static int flashsv_decode_frame(AVCodecContext *avctx, void *data,
 
             /* skip unchanged blocks, which have size 0 */
             if (size) {
-                /* decompress block */
-                uint8_t *line = s->tmpblock;
-                int k;
-                int ret = inflateReset(&s->zstream);
-                if (ret != Z_OK) {
+                if (flashsv_decode_block(avctx, avpkt, &gb, size,
+                                         cur_blk_width, cur_blk_height,
+                                         x_pos, y_pos))
                     av_log(avctx, AV_LOG_ERROR,
-                           "error in decompression (reset) of block %dx%d\n", i, j);
-                    /* return -1; */
-                }
-                s->zstream.next_in   = avpkt->data + get_bits_count(&gb) / 8;
-                s->zstream.avail_in  = size;
-                s->zstream.next_out  = s->tmpblock;
-                s->zstream.avail_out = s->block_size * 3;
-                ret = inflate(&s->zstream, Z_FINISH);
-                if (ret == Z_DATA_ERROR) {
-                    av_log(avctx, AV_LOG_ERROR, "Zlib resync occurred\n");
-                    inflateSync(&s->zstream);
-                    ret = inflate(&s->zstream, Z_FINISH);
-                }
-
-                if (ret != Z_OK && ret != Z_STREAM_END) {
-                    av_log(avctx, AV_LOG_ERROR,
-                           "error in decompression of block %dx%d: %d\n", i, j, ret);
-                    /* return -1; */
-                }
-                /* Flash Screen Video stores the image upside down, so copy
-                 * lines to destination in reverse order. */
-                for (k = 1; k <= cur_blk_height; k++) {
-                    memcpy(s->frame.data[0] + x_pos * 3 +
-                           (s->image_height - y_pos - k) * s->frame.linesize[0],
-                           line, cur_blk_width * 3);
-                    /* advance source pointer to next line */
-                    line += cur_blk_width * 3;
-                }
-                skip_bits_long(&gb, 8 * size);   /* skip the consumed bits */
+                           "error in decompression of block %dx%d\n", i, j);
             }
         }
     }

libavcodec/flashsvenc.c

@@ -27,31 +27,21 @@
  * Flash Screen Video encoder
  * @author Alex Beregszaszi
  * @author Benjamin Larsson
+ *
+ * A description of the bitstream format for Flash Screen Video version 1/2
+ * is part of the SWF File Format Specification (version 10), which can be
+ * downloaded from http://www.adobe.com/devnet/swf.html.
  */
 
-/* Bitstream description
- * The picture is divided into blocks that are zlib-compressed.
- *
- * The decoder is fed complete frames, the frameheader contains:
- * 4bits of block width
- * 12bits of frame width
- * 4bits of block height
- * 12bits of frame height
- *
- * Directly after the header are the compressed blocks. The blocks
- * have their compressed size represented with 16bits in the beginig.
- * If the size = 0 then the block is unchanged from the previous frame.
- * All blocks are decompressed until the buffer is consumed.
- *
- * Encoding ideas, a basic encoder would just use a fixed block size.
- * Block sizes can be multipels of 16, from 16 to 256. The blocks don't
+/*
+ * Encoding ideas: A basic encoder would just use a fixed block size.
+ * Block sizes can be multiples of 16, from 16 to 256. The blocks don't
  * have to be quadratic. A brute force search with a set of different
  * block sizes should give a better result than to just use a fixed size.
- */
-
-/* TODO:
- * Don't reencode the frame in brute force mode if the frame is a dupe. Speed up.
- * Make the difference check faster.
+ *
+ * TODO:
+ * Don't reencode the frame in brute force mode if the frame is a dupe.
+ * Speed up. Make the difference check faster.
  */
 
 #include <stdio.h>
@@ -85,8 +75,8 @@ static int copy_region_enc(uint8_t *sptr, uint8_t *dptr, int dx, int dy,
     int diff = 0;
 
     for (i = dx + h; i > dx; i--) {
-        nsptr  = sptr  + (i * stride) + dy * 3;
-        npfptr = pfptr + (i * stride) + dy * 3;
+        nsptr  = sptr  + i * stride + dy * 3;
+        npfptr = pfptr + i * stride + dy * 3;
         for (j = 0; j < w * 3; j++) {
             diff    |= npfptr[j] ^ nsptr[j];
             dptr[j]  = nsptr[j];
@@ -104,13 +94,14 @@ static av_cold int flashsv_encode_init(AVCodecContext *avctx)
 
     s->avctx = avctx;
 
-    if ((avctx->width > 4095) || (avctx->height > 4095)) {
-        av_log(avctx, AV_LOG_ERROR, "Input dimensions too large, input must be max 4096x4096 !\n");
+    if (avctx->width > 4095 || avctx->height > 4095) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Input dimensions too large, input must be max 4096x4096 !\n");
         return AVERROR_INVALIDDATA;
     }
 
     // Needed if zlib unused or init aborted before deflateInit
-    memset(&(s->zstream), 0, sizeof(z_stream));
+    memset(&s->zstream, 0, sizeof(z_stream));
 
     s->last_key_frame = 0;
 
@@ -141,9 +132,9 @@ static int encode_bitstream(FlashSVContext *s, AVFrame *p, uint8_t *buf,
 
     init_put_bits(&pb, buf, buf_size * 8);
 
-    put_bits(&pb,  4, (block_width / 16) - 1);
+    put_bits(&pb,  4, block_width / 16 - 1);
     put_bits(&pb, 12, s->image_width);
-    put_bits(&pb,  4, (block_height / 16) - 1);
+    put_bits(&pb,  4, block_height / 16 - 1);
     put_bits(&pb, 12, s->image_height);
     flush_put_bits(&pb);
     buf_pos = 4;
@@ -156,37 +147,36 @@ static int encode_bitstream(FlashSVContext *s, AVFrame *p, uint8_t *buf,
     /* loop over all block columns */
     for (j = 0; j < v_blocks + (v_part ? 1 : 0); j++) {
 
-        int hp = j * block_height; // horiz position in frame
-        int hs = (j < v_blocks) ? block_height : v_part; // size of block
+        int y_pos = j * block_height; // vertical position in frame
+        int cur_blk_height = (j < v_blocks) ? block_height : v_part;
 
         /* loop over all block rows */
         for (i = 0; i < h_blocks + (h_part ? 1 : 0); i++) {
-            int wp  = i * block_width; // vert position in frame
-            int ws  = (i < h_blocks) ? block_width : h_part; // size of block
+            int x_pos = i * block_width; // horizontal position in frame
+            int cur_blk_width = (i < h_blocks) ? block_width : h_part;
             int ret = Z_OK;
-            uint8_t *ptr;
-
-            ptr = buf + buf_pos;
+            uint8_t *ptr = buf + buf_pos;
 
             /* copy the block to the temp buffer before compression
              * (if it differs from the previous frame's block) */
             res = copy_region_enc(p->data[0], s->tmpblock,
-                                  s->image_height - (hp + hs + 1),
-                                  wp, hs, ws, p->linesize[0], previous_frame);
+                                  s->image_height - (y_pos + cur_blk_height + 1),
+                                  x_pos, cur_blk_height, cur_blk_width,
+                                  p->linesize[0], previous_frame);
 
             if (res || *I_frame) {
-                unsigned long zsize;
-                zsize = 3 * block_width * block_height;
-                ret   = compress2(ptr + 2, &zsize, s->tmpblock, 3 * ws * hs, 9);
+                unsigned long zsize = 3 * block_width * block_height;
+                ret = compress2(ptr + 2, &zsize, s->tmpblock,
+                                3 * cur_blk_width * cur_blk_height, 9);
 
-
-                //ret = deflateReset(&(s->zstream));
+                //ret = deflateReset(&s->zstream);
                 if (ret != Z_OK)
-                    av_log(s->avctx, AV_LOG_ERROR, "error while compressing block %dx%d\n", i, j);
+                    av_log(s->avctx, AV_LOG_ERROR,
+                           "error while compressing block %dx%d\n", i, j);
 
-                bytestream_put_be16(&ptr, (unsigned int) zsize);
+                bytestream_put_be16(&ptr, zsize);
                 buf_pos += zsize + 2;
-                //av_log(avctx, AV_LOG_ERROR, "buf_pos = %d\n", buf_pos);
+                av_dlog(s->avctx, "buf_pos = %d\n", buf_pos);
             } else {
                 pred_blocks++;
                 bytestream_put_be16(&ptr, 0);
@@ -213,7 +203,7 @@ static int flashsv_encode_frame(AVCodecContext *avctx, uint8_t *buf,
     uint8_t *pfptr;
     int res;
     int I_frame = 0;
-    int opt_w, opt_h;
+    int opt_w = 4, opt_h = 4;
 
     *p = *pict;
 
@@ -228,34 +218,32 @@ static int flashsv_encode_frame(AVCodecContext *avctx, uint8_t *buf,
     }
 
     if (p->linesize[0] < 0)
-        pfptr = s->previous_frame - ((s->image_height - 1) * p->linesize[0]);
+        pfptr = s->previous_frame - (s->image_height - 1) * p->linesize[0];
     else
         pfptr = s->previous_frame;
 
     /* Check the placement of keyframes */
-    if (avctx->gop_size > 0) {
-        if (avctx->frame_number >= s->last_key_frame + avctx->gop_size) {
+    if (avctx->gop_size > 0 &&
+        avctx->frame_number >= s->last_key_frame + avctx->gop_size) {
         I_frame = 1;
     }
-    }
-
-    opt_w = 4;
-    opt_h = 4;
 
-    if (buf_size < s->image_width*s->image_height*3) {
+    if (buf_size < s->image_width * s->image_height * 3) {
         //Conservative upper bound check for compressed data
         av_log(avctx, AV_LOG_ERROR, "buf_size %d <  %d\n",
                buf_size, s->image_width * s->image_height * 3);
         return -1;
     }
 
-    res = encode_bitstream(s, p, buf, buf_size, opt_w * 16, opt_h * 16, pfptr, &I_frame);
+    res = encode_bitstream(s, p, buf, buf_size, opt_w * 16, opt_h * 16,
+                           pfptr, &I_frame);
 
     //save the current frame
     if (p->linesize[0] > 0)
         memcpy(s->previous_frame, p->data[0], s->image_height * p->linesize[0]);
     else
-        memcpy(s->previous_frame, p->data[0] + p->linesize[0] * (s->image_height - 1),
+        memcpy(s->previous_frame,
+               p->data[0] + p->linesize[0] * (s->image_height - 1),
                s->image_height * FFABS(p->linesize[0]));
 
     //mark the frame type so the muxer can mux it correctly
@@ -263,7 +251,7 @@ static int flashsv_encode_frame(AVCodecContext *avctx, uint8_t *buf,
         p->pict_type      = AV_PICTURE_TYPE_I;
         p->key_frame      = 1;
         s->last_key_frame = avctx->frame_number;
-        av_log(avctx, AV_LOG_DEBUG, "Inserting key frame at frame %d\n", avctx->frame_number);
+        av_dlog(avctx, "Inserting keyframe at frame %d\n", avctx->frame_number);
     } else {
         p->pict_type = AV_PICTURE_TYPE_P;
         p->key_frame = 0;
@@ -278,7 +266,7 @@ static av_cold int flashsv_encode_end(AVCodecContext *avctx)
 {
     FlashSVContext *s = avctx->priv_data;
 
-    deflateEnd(&(s->zstream));
+    deflateEnd(&s->zstream);
 
     av_free(s->encbuffer);
     av_free(s->previous_frame);

libavcodec/libopenjpeg.c

@@ -62,7 +62,7 @@ static int libopenjpeg_decode_frame(AVCodecContext *avctx,
                                     void *data, int *data_size,
                                     AVPacket *avpkt)
 {
-    const uint8_t *buf = avpkt->data;
+    uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     LibOpenJPEGContext *ctx = avctx->priv_data;
     AVFrame *picture = &ctx->image, *output = data;

libavcodec/libspeexdec.c

@@ -96,7 +96,7 @@ static int libspeex_decode_frame(AVCodecContext *avctx,
                                  void *data, int *data_size,
                                  AVPacket *avpkt)
 {
-    const uint8_t *buf = avpkt->data;
+    uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     LibSpeexContext *s = avctx->priv_data;
     int16_t *output = data, *end;

libavcodec/mjpegdec.c

@@ -1258,29 +1258,6 @@ static int mjpeg_decode_com(MJpegDecodeContext *s)
     return 0;
 }
 
-#if 0
-static int valid_marker_list[] =
-{
-        /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
-/* 0 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 1 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 2 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 3 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 4 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 5 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 6 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 7 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 8 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* 9 */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* a */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* b */    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-/* c */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-/* d */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-/* e */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-/* f */    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
-}
-#endif
-
 /* return the 8 bit start code value and update the search
    state. Return -1 if no start code found */
 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)

libavcodec/mpegaudioenc.c

@@ -315,8 +315,6 @@ static void filter(MpegAudioContext *s, int ch, const short *samples, int incr)
     int tmp1[32];
     int *out;
 
-    //    print_pow1(samples, 1152);
-
     offset = s->samples_offset[ch];
     out = &s->sb_samples[ch][0][0][0];
     for(j=0;j<36;j++) {
@@ -360,8 +358,6 @@ static void filter(MpegAudioContext *s, int ch, const short *samples, int incr)
         }
     }
     s->samples_offset[ch] = offset;
-
-    //    print_pow(s->sb_samples, 1152);
 }
 
 static void compute_scale_factors(unsigned char scale_code[SBLIMIT],

libavcodec/ppc/dsputil_altivec.c

@@ -627,16 +627,6 @@ void put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size,
 // it's faster than -funroll-loops, but using
 // -funroll-loops w/ this is bad - 74 cycles again.
 // all this is on a 7450, tuning for the 7450
-#if 0
-    for (i = 0; i < h; i++) {
-        pixelsv1 = vec_ld(0, pixels);
-        pixelsv2 = vec_ld(16, pixels);
-        vec_st(vec_perm(pixelsv1, pixelsv2, perm),
-               0, block);
-        pixels+=line_size;
-        block +=line_size;
-    }
-#else
     for (i = 0; i < h; i += 4) {
         pixelsv1  = vec_ld( 0, pixels);
         pixelsv2  = vec_ld(15, pixels);
@@ -657,7 +647,6 @@ void put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size,
         pixels+=line_size_4;
         block +=line_size_4;
     }
-#endif
 }
 
 /* next one assumes that ((line_size % 16) == 0) */

libavcodec/ppc/dsputil_ppc.c

@@ -48,7 +48,6 @@ static void clear_blocks_dcbz32_ppc(DCTELEM *blocks)
 {
     register int misal = ((unsigned long)blocks & 0x00000010);
     register int i = 0;
-#if 1
     if (misal) {
         ((unsigned long*)blocks)[0] = 0L;
         ((unsigned long*)blocks)[1] = 0L;
@@ -66,9 +65,6 @@ static void clear_blocks_dcbz32_ppc(DCTELEM *blocks)
         ((unsigned long*)blocks)[191] = 0L;
         i += 16;
     }
-#else
-    memset(blocks, 0, sizeof(DCTELEM)*6*64);
-#endif
 }
 
 /* same as above, when dcbzl clear a whole 128B cache line
@@ -78,7 +74,6 @@ static void clear_blocks_dcbz128_ppc(DCTELEM *blocks)
 {
     register int misal = ((unsigned long)blocks & 0x0000007f);
     register int i = 0;
-#if 1
     if (misal) {
         // we could probably also optimize this case,
         // but there's not much point as the machines
@@ -89,9 +84,6 @@ static void clear_blocks_dcbz128_ppc(DCTELEM *blocks)
         for ( ; i < sizeof(DCTELEM)*6*64 ; i += 128) {
             __asm__ volatile("dcbzl %0,%1" : : "b" (blocks), "r" (i) : "memory");
         }
-#else
-    memset(blocks, 0, sizeof(DCTELEM)*6*64);
-#endif
 }
 #else
 static void clear_blocks_dcbz128_ppc(DCTELEM *blocks)

libavcodec/ppc/fdct_altivec.c

@@ -265,7 +265,6 @@ void fdct_altivec(int16_t *block)
  * conversion to vector float.  The following code section takes advantage
  * of this.
  */
-#if 1
     /* fdct rows {{{ */
     x0 = ((vector float)vec_add(vs16(b00), vs16(b70)));
     x7 = ((vector float)vec_sub(vs16(b00), vs16(b70)));
@@ -389,29 +388,6 @@ void fdct_altivec(int16_t *block)
     b31 = vec_add(b31, x2);
     b11 = vec_add(b11, x3);
     /* }}} */
-#else
-    /* convert to float {{{ */
-#define CTF(n) \
-    vs32(b##n##1) = vec_unpackl(vs16(b##n##0)); \
-    vs32(b##n##0) = vec_unpackh(vs16(b##n##0)); \
-    b##n##1 = vec_ctf(vs32(b##n##1), 0); \
-    b##n##0 = vec_ctf(vs32(b##n##0), 0); \
-
-    CTF(0);
-    CTF(1);
-    CTF(2);
-    CTF(3);
-    CTF(4);
-    CTF(5);
-    CTF(6);
-    CTF(7);
-
-#undef CTF
-    /* }}} */
-
-    FDCTROW(b00, b10, b20, b30, b40, b50, b60, b70);
-    FDCTROW(b01, b11, b21, b31, b41, b51, b61, b71);
-#endif
 
 
     /* 8x8 matrix transpose (vector float[8][2]) {{{ */

libavcodec/ppc/mpegvideo_altivec.c

@@ -515,21 +515,6 @@ static void dct_unquantize_h263_altivec(MpegEncContext *s,
         qaddv = vec_splat((vec_s16)vec_lde(0, &qadd8), 0);
         nqaddv = vec_sub(vczero, qaddv);
 
-#if 0   // block *is* 16 bytes-aligned, it seems.
-        // first make sure block[j] is 16 bytes-aligned
-        for(j = 0; (j <= nCoeffs) && ((((unsigned long)block) + (j << 1)) & 0x0000000F) ; j++) {
-            level = block[j];
-            if (level) {
-                if (level < 0) {
-                    level = level * qmul - qadd;
-                } else {
-                    level = level * qmul + qadd;
-                }
-                block[j] = level;
-            }
-        }
-#endif
-
         // vectorize all the 16 bytes-aligned blocks
         // of 8 elements
         for(; (j + 7) <= nCoeffs ; j+=8) {
@@ -599,9 +584,6 @@ void MPV_common_init_altivec(MpegEncContext *s)
 
     if ((s->avctx->dct_algo == FF_DCT_AUTO) ||
             (s->avctx->dct_algo == FF_DCT_ALTIVEC)) {
-#if 0 /* seems to cause trouble under some circumstances */
-        s->dct_quantize = dct_quantize_altivec;
-#endif
         s->dct_unquantize_h263_intra = dct_unquantize_h263_altivec;
         s->dct_unquantize_h263_inter = dct_unquantize_h263_altivec;
     }

libavcodec/rv30.c

@@ -256,6 +256,7 @@ static av_cold int rv30_decode_init(AVCodecContext *avctx)
     if(avctx->extradata_size - 8 < (r->rpr - 1) * 2){
         av_log(avctx, AV_LOG_ERROR, "Insufficient extradata - need at least %d bytes, got %d\n",
                6 + r->rpr * 2, avctx->extradata_size);
+        return EINVAL;
     }
     r->parse_slice_header = rv30_parse_slice_header;
     r->decode_intra_types = rv30_decode_intra_types;

libavcodec/sp5x.h

@@ -235,100 +235,4 @@ static const uint8_t sp5x_quant_table[20][64]=
       124,124,124,124,124,124,124,124,124,124,124,124,124,124,124,124 }
 };
 
-#if 0
-/* 4NF-M, not ZigZag */
-static const uint8_t sp5x_quant_table_orig[18][64] =
-{
-    /* index 0, Q50 */
-    {  16, 11, 10, 16, 24, 40, 51, 61, 12, 12, 14, 19, 26, 58, 60, 55,
-       14, 13, 16, 24, 40, 57, 69, 56, 14, 17, 22, 29, 51, 87, 80, 62,
-       18, 22, 37, 56, 68,109,103, 77, 24, 35, 55, 64, 81,104,113, 92,
-       49, 64, 78, 87,103,121,120,101, 72, 92, 95, 98,112,100,103, 99 },
-    {  17, 18, 24, 47, 99, 99, 99, 99, 18, 21, 26, 66, 99, 99, 99, 99,
-       24, 26, 56, 99, 99, 99, 99, 99, 47, 66, 99, 99, 99, 99, 99, 99,
-       99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99,
-       99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99 },
-
-    /* index 1, Q70 */
-    {  10,  7,  6, 10, 14, 24, 31, 37,  7,  7,  8, 11, 16, 35, 36, 33,
-        8,  8, 10, 14, 24, 34, 41, 34,  8, 10, 13, 17, 31, 52, 48, 37,
-       11, 13, 22, 34, 41, 65, 62, 46, 14, 21, 33, 38, 49, 62, 68, 55,
-       29, 38, 47, 52, 62, 73, 72, 61, 43, 55, 57, 59, 67, 60, 62, 59 },
-    {  10, 11, 14, 28, 59, 59, 59, 59, 11, 13, 16, 40, 59, 59, 59, 59,
-       14, 16, 34, 59, 59, 59, 59, 59, 28, 40, 59, 59, 59, 59, 59, 59,
-       59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59,
-       59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59 },
-
-    /* index 2, Q80 */
-    {   6,  4,  4,  6, 10, 16, 20, 24,  5,  5,  6,  8, 10, 23, 24, 22,
-        6,  5,  6, 10, 16, 23, 28, 22,  6,  7,  9, 12, 20, 35, 32, 25,
-        7,  9, 15, 22, 27, 44, 41, 31, 10, 14, 22, 26, 32, 42, 45, 37,
-       20, 26, 31, 35, 41, 48, 48, 40, 29, 37, 38, 39, 45, 40, 41, 40 },
-    {   7,  7, 10, 19, 40, 40, 40, 40,  7,  8, 10, 26, 40, 40, 40, 40,
-       10, 10, 22, 40, 40, 40, 40, 40, 19, 26, 40, 40, 40, 40, 40, 40,
-       40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
-       40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40 },
-
-    /* index 3, Q85 */
-    {   5,  3,  3,  5,  7, 12, 15, 18,  4,  4,  4,  6,  8, 17, 18, 17,
-        4,  4,  5,  7, 12, 17, 21, 17,  4,  5,  7,  9, 15, 26, 24, 19,
-        5,  7, 11, 17, 20, 33, 31, 23,  7, 11, 17, 19, 24, 31, 34, 28,
-       15, 19, 23, 26, 31, 36, 36, 30, 22, 28, 29, 29, 34, 30, 31, 30 },
-    {   5,  5,  7, 14, 30, 30, 30, 30,  5,  6,  8, 20, 30, 30, 30, 30,
-        7,  8, 17, 30, 30, 30, 30, 30, 14, 20, 30, 30, 30, 30, 30, 30,
-       30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30,
-       30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30 },
-
-    /* index 4, Q90 */
-    {   3,  2,  2,  3,  5,  8, 10, 12,  2,  2,  3,  4,  5, 12, 12, 11,
-        3,  3,  3,  5,  8, 11, 14, 11,  3,  3,  4,  6, 10, 17, 16, 12,
-        4,  4,  7, 11, 14, 22, 21, 15,  5,  7, 11, 13, 16, 21, 23, 18,
-       10, 13, 16, 17, 21, 24, 24, 20, 14, 18, 19, 20, 22, 20, 21, 20 },
-    {   3,  4,  5,  9, 20, 20, 20, 20,  4,  4,  5, 13, 20, 20, 20, 20,
-        5,  5, 11, 20, 20, 20, 20, 20,  9, 13, 20, 20, 20, 20, 20, 20,
-       20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
-       20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20 },
-
-    /* index 5, Q60 */
-    {  13,  9,  8, 13, 19, 32, 41, 49, 10, 10, 11, 15, 21, 46, 48, 44,
-       11, 10, 13, 19, 32, 46, 55, 45, 11, 14, 18, 23, 41, 70, 64, 50,
-       14, 18, 30, 45, 54, 87, 82, 62, 19, 28, 44, 51, 65, 83, 90, 74,
-       39, 51, 62, 70, 82, 97, 96, 81, 58, 74, 76, 78, 90, 80, 82, 79 },
-    {  14, 14, 19, 38, 79, 79, 79, 79, 14, 17, 21, 53, 79, 79, 79, 79,
-       19, 21, 45, 79, 79, 79, 79, 79, 38, 53, 79, 79, 79, 79, 79, 79,
-       79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79,
-       79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79 },
-
-    /* index 6, Q25 */
-    {  32, 22, 20, 32, 48, 80,102,122, 24, 24, 28, 38, 52,116,120,110,
-       28, 26, 32, 48, 80,114,138,112, 28, 34, 44, 58,102,174,160,124,
-       36, 44, 74,112,136,218,206,154, 48, 70,110,128,162,208,226,184,
-       98,128,156,174,206,242,240,202,144,184,190,196,224,200,206,198 },
-    {  34, 36, 48, 94,198,198,198,198, 36, 42, 52,132,198,198,198,198,
-       48, 52,112,198,198,198,198,198, 94,132,198,198,198,198,198,198,
-      198,198,198,198,198,198,198,198,198,198,198,198,198,198,198,198,
-      198,198,198,198,198,198,198,198,198,198,198,198,198,198,198,198 },
-
-    /* index 7, Q95 */
-    {   2,  1,  1,  2,  2,  4,  5,  6,  1,  1,  1,  2,  3,  6,  6,  6,
-        1,  1,  2,  2,  4,  6,  7,  6,  1,  2,  2,  3,  5,  9,  8,  6,
-        2,  2,  4,  6,  7, 11, 10,  8,  2,  4,  6,  6,  8, 10, 11,  9,
-        5,  6,  8,  9, 10, 12, 12, 10,  7,  9, 10, 10, 11, 10, 10, 10 },
-    {   2,  2,  2,  5, 10, 10, 10, 10,  2,  2,  3,  7, 10, 10, 10, 10,
-        2,  3,  6, 10, 10, 10, 10, 10,  5,  7, 10, 10, 10, 10, 10, 10,
-       10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
-       10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10 },
-
-    /* index 8, Q93 */
-    {   2,  2,  1,  2,  3,  6,  7,  9,  2,  2,  2,  3,  4,  8,  8,  8,
-        2,  2,  2,  3,  6,  8, 10,  8,  2,  2,  3,  4,  7, 12, 11,  9,
-        3,  3,  5,  8, 10, 15, 14, 11,  3,  5,  8,  9, 11, 15, 16, 13,
-        7,  9, 11, 12, 14, 17, 17, 14, 10, 13, 13, 14, 16, 14, 14, 14 },
-    {   2,  3,  3,  7, 14, 14, 14, 14,  3,  3,  4,  9, 14, 14, 14, 14,
-        3,  4,  8, 14, 14, 14, 14, 14,  7,  9, 14, 14, 14, 14, 14, 14,
-       14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
-       14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14 }
-};
-#endif
-
 #endif /* AVCODEC_SP5X_H */

libavcodec/vaapi_mpeg2.c

@@ -109,14 +109,14 @@ static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer
     MpegEncContext * const s = avctx->priv_data;
     VASliceParameterBufferMPEG2 *slice_param;
     GetBitContext gb;
-    uint32_t start_code av_unused, quantiser_scale_code, intra_slice_flag, macroblock_offset;
+    uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset;
 
     av_dlog(avctx, "vaapi_mpeg2_decode_slice(): buffer %p, size %d\n", buffer, size);
 
     /* Determine macroblock_offset */
     init_get_bits(&gb, buffer, 8 * size);
-    start_code = get_bits(&gb, 32);
-    assert((start_code & 0xffffff00) == 0x00000100);
+    if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */
+        return AVERROR_INVALIDDATA;
     quantiser_scale_code = get_bits(&gb, 5);
     intra_slice_flag = get_bits1(&gb);
     if (intra_slice_flag) {

libavcodec/vc1data.c

@@ -187,75 +187,6 @@ const uint8_t ff_vc1_norm6_bits[64] = {
  4,  8,  8, 10,  8, 10, 10, 13,  8, 10, 10, 13, 10, 13, 13,  9,
  8, 10, 10, 13, 10, 13, 13,  9, 10, 13, 13,  9, 13,  9,  9,  6,
 };
-#if 0
-/* Normal-6 imode */
-const uint8_t ff_vc1_norm6_spec[64][5] = {
-{ 0,  1, 1        },
-{ 1,  2, 4        },
-{ 2,  3, 4        },
-{ 3,  0, 8        },
-{ 4,  4, 4        },
-{ 5,  1, 8        },
-{ 6,  2, 8        },
-{ 7,  2, 5,  7, 5 },
-{ 8,  5, 4        },
-{ 9,  3, 8        },
-{10,  4, 8        },
-{11,  2, 5, 11, 5 },
-{12,  5, 8        },
-{13,  2, 5, 13, 5 },
-{14,  2, 5, 14, 5 },
-{15,  3, 5, 14, 8 },
-{16,  6, 4        },
-{17,  6, 8        },
-{18,  7, 8        },
-{19,  2, 5, 19, 5 },
-{20,  8, 8        },
-{21,  2, 5, 21, 5 },
-{22,  2, 5, 22, 5 },
-{23,  3, 5, 13, 8 },
-{24,  9, 8        },
-{25,  2, 5, 25, 5 },
-{26,  2, 5, 26, 5 },
-{27,  3, 5, 12, 8 },
-{28,  2, 5, 28, 5 },
-{29,  3, 5, 11, 8 },
-{30,  3, 5, 10, 8 },
-{31,  3, 5,  7, 4 },
-{32,  7, 4        },
-{33, 10, 8        },
-{34, 11, 8        },
-{35,  2, 5,  3, 5 },
-{36, 12, 8        },
-{37,  2, 5,  5, 5 },
-{38,  2, 5,  6, 5 },
-{39,  3, 5,  9, 8 },
-{40, 13, 8        },
-{41,  2, 5,  9, 5 },
-{42,  2, 5, 10, 5 },
-{43,  3, 5,  8, 8 },
-{44,  2, 5, 12, 5 },
-{45,  3, 5,  7, 8 },
-{46,  3, 5,  6, 8 },
-{47,  3, 5,  6, 4 },
-{48, 14, 8        },
-{49,  2, 5, 17, 5 },
-{50,  2, 5, 18, 5 },
-{51,  3, 5,  5, 8 },
-{52,  2, 5, 20, 5 },
-{53,  3, 5,  4, 8 },
-{54,  3, 5,  3, 8 },
-{55,  3, 5,  5, 4 },
-{56,  2, 5, 24, 5 },
-{57,  3, 5,  2, 8 },
-{58,  3, 5,  1, 8 },
-{59,  3, 5,  4, 4 },
-{60,  3, 5,  0, 8 },
-{61,  3, 5,  3, 4 },
-{62,  3, 5,  2, 4 },
-{63,  3, 5,  1, 1 },
-};
-#endif
 
 /* 4MV Block pattern VLC tables */
 const uint8_t ff_vc1_4mv_block_pattern_codes[4][16] = {
@@ -276,7 +207,7 @@ const uint8_t wmv3_dc_scale_table[32]={
 };
 
 /* P-Picture CBPCY VLC tables */
-#if 1 // Looks like original tables are not conforming to standard at all. Are they used for old WMV?
+// Looks like original tables are not conforming to standard at all. Are they used for old WMV?
 const uint16_t ff_vc1_cbpcy_p_codes[4][64] = {
   {
       0,   6,  15,  13,  13,  11,   3,  13,   5,   8,  49,  10,  12, 114, 102, 119,
@@ -330,60 +261,6 @@ const uint8_t ff_vc1_cbpcy_p_bits[4][64] = {
      9,   9,   9,   9,   9,   9,   9,   9,   9,   9,   9,   9,   9,   9,   9,   8
   }
 };
-#else
-const uint16_t ff_vc1_cbpcy_p_codes[4][64] = {
-  {
-      0,   1,   1,   4,   5,   1,  12,   4,  13,  14,  10,  11,  12,   7,  13,   2,
-     15,   1,  96,   1,  49,  97,   2, 100,   3,   4,   5, 101, 102,  52,  53,   4,
-      6,   7,  54, 103,   8,   9,  10, 110,  11,  12, 111,  56, 114,  58, 115,   5,
-     13,   7,   8,   9,  10,  11,  12,  30,  13,  14,  15, 118, 119,  62,  63,   3
-  },
-  {
-      0,   1,   2,   1,   3,   1,  16,  17,   5,  18,  12,  19,  13,   1,  28,  58,
-      1,   1,   1,   2,   3,   2,   3, 236, 237,   4,   5, 238,   6,   7, 239,   8,
-      9, 240,  10,  11, 121, 122,  12,  13,  14,  15, 241, 246,  16,  17, 124,  63,
-     18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,  30,  31, 247, 125
-  },
-  {
-      0,   1,   2,   3,   2,   3,   1,   4,   5,  24,   7,  13,  16,  17,   9,   5,
-     25,   1,   1,   1,   2,   3,  96, 194,   1,   2,  98,  99, 195, 200, 101,  26,
-    201, 102, 412, 413, 414,  54, 220, 111, 221,   3, 224, 113, 225, 114, 230,  29,
-    231, 415, 240,   4, 241, 484,   5, 243,   3, 244, 245, 485, 492, 493, 247,  31
-  },
-  {
-      0,   1,   1,   1,   2,   2,   3,   4,   3,   5,   6,   7,   8,   9,  10,  11,
-     12,  13,  14,  15,  16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,
-     28,  29,  30,  31,  32,  33,  34,  35,  36,  37,  38,  39,  40,  41,  42,  43,
-     44,  45,  46,  47,  48,  49,  50,  51,  52,  53,  54,  55,  28,  29,  30,  31
-   }
-};
-const uint8_t ff_vc1_cbpcy_p_bits[4][64] = {
-  {
-    13,  6,  5,  6,  6,  7,  7,  5,  7,  7,  6,  6,  6,  5,  6,  3,
-     7,  8,  8, 13,  7,  8, 13,  8, 13, 13, 13,  8,  8,  7,  7,  3,
-    13, 13,  7,  8, 13, 13, 13,  8, 13, 13,  8,  7,  8,  7,  8,  3,
-    13, 12, 12, 12, 12, 12, 12,  6, 12, 12, 12,  8,  8,  7,  7,  2
-  },
-  {
-    14,  3,  3,  5,  3,  4,  5,  5,  3,  5,  4,  5,  4,  6,  5,  6,
-     8, 14, 13,  8,  8, 13, 13,  8,  8, 13, 13,  8, 13, 13,  8, 13,
-    13,  8, 13, 13,  7,  7, 13, 13, 13, 13,  8,  8, 13, 13,  7,  6,
-    13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,  8,  7
-  },
-  {
-    13,  5,  5,  5,  4,  4,  6,  4,  4,  6,  4,  5,  5,  5,  4,  3,
-     6,  8, 10,  9,  8,  8,  7,  8, 13, 13,  7,  7,  8,  8,  7,  5,
-     8,  7,  9,  9,  9,  6,  8,  7,  8, 13,  8,  7,  8,  7,  8,  5,
-     8,  9,  8, 13,  8,  9, 13,  8, 12,  8,  8,  9,  9,  9,  8,  5
-  },
-  {
-     9,  2,  3,  9,  2,  9,  9,  9,  2,  9,  9,  9,  9,  9,  9,  9,
-     9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,
-     9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,
-     9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  9,  8,  8,  8,  8
-  }
-};
-#endif
 
 /* MacroBlock Transform Type: 7.1.3.11, p89
  * 8x8:B

libavformat/aviobuf.c

@@ -847,19 +847,13 @@ int ffio_fdopen(AVIOContext **s, URLContext *h)
     if (!buffer)
         return AVERROR(ENOMEM);
 
-    *s = av_mallocz(sizeof(AVIOContext));
-    if(!*s) {
+    *s = avio_alloc_context(buffer, buffer_size, h->flags & AVIO_FLAG_WRITE, h,
+                            ffurl_read, ffurl_write, ffurl_seek);
+    if (!*s) {
         av_free(buffer);
         return AVERROR(ENOMEM);
     }
 
-    if (ffio_init_context(*s, buffer, buffer_size,
-                      h->flags & AVIO_FLAG_WRITE, h,
-                      (void*)ffurl_read, (void*)ffurl_write, (void*)ffurl_seek) < 0) {
-        av_free(buffer);
-        av_freep(s);
-        return AVERROR(EIO);
-    }
 #if FF_API_OLD_AVIO
     (*s)->is_streamed = h->is_streamed;
 #endif

libavformat/utils.c

@@ -80,7 +80,7 @@ const char *avformat_license(void)
  * @param num must be >= 0
  * @param den must be >= 1
  */
-static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
+static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
 {
     num += (den >> 1);
     if (num >= den) {
@@ -98,7 +98,7 @@ static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
  * @param f fractional number
  * @param incr increment, can be positive or negative
  */
-static void av_frac_add(AVFrac *f, int64_t incr)
+static void frac_add(AVFrac *f, int64_t incr)
 {
     int64_t num, den;
 
@@ -1116,7 +1116,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
 }
 
 
-static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
+static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
 {
     AVStream *st;
     int len, ret, i;
@@ -1247,7 +1247,7 @@ static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
         }
     }
     if(s->debug & FF_FDEBUG_TS)
-        av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
+        av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
             pkt->stream_index,
             pkt->pts,
             pkt->dts,
@@ -1293,7 +1293,7 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
             }
         }
         if(genpts){
-            int ret= av_read_frame_internal(s, pkt);
+            int ret= read_frame_internal(s, pkt);
             if(ret<0){
                 if(pktl && ret != AVERROR(EAGAIN)){
                     eof=1;
@@ -1307,7 +1307,7 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
                 return AVERROR(ENOMEM);
         }else{
             assert(!s->packet_buffer);
-            return av_read_frame_internal(s, pkt);
+            return read_frame_internal(s, pkt);
         }
     }
 }
@@ -1679,7 +1679,7 @@ int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, i
     return pos;
 }
 
-static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
+static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
     int64_t pos_min, pos_max;
 #if 0
     AVStream *st;
@@ -1704,7 +1704,7 @@ static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos,
     return 0;
 }
 
-static int av_seek_frame_generic(AVFormatContext *s,
+static int seek_frame_generic(AVFormatContext *s,
                                  int stream_index, int64_t timestamp, int flags)
 {
     int index;
@@ -1772,7 +1772,7 @@ int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int f
     ff_read_frame_flush(s);
 
     if(flags & AVSEEK_FLAG_BYTE)
-        return av_seek_frame_byte(s, stream_index, timestamp, flags);
+        return seek_frame_byte(s, stream_index, timestamp, flags);
 
     if(stream_index < 0){
         stream_index= av_find_default_stream_index(s);
@@ -1796,7 +1796,7 @@ int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int f
     if(s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH))
         return av_seek_frame_binary(s, stream_index, timestamp, flags);
     else if (!(s->iformat->flags & AVFMT_NOGENSEARCH))
-        return av_seek_frame_generic(s, stream_index, timestamp, flags);
+        return seek_frame_generic(s, stream_index, timestamp, flags);
     else
         return -1;
 }
@@ -1820,7 +1820,7 @@ int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int
     if(s->iformat->read_seek || 1)
         return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
 
-    // try some generic seek like av_seek_frame_generic() but with new ts semantics
+    // try some generic seek like seek_frame_generic() but with new ts semantics
 }
 
 /*******************************************************/
@@ -1830,7 +1830,7 @@ int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int
  *
  * @return TRUE if the stream has accurate duration for at least one component.
  */
-static int av_has_duration(AVFormatContext *ic)
+static int has_duration(AVFormatContext *ic)
 {
     int i;
     AVStream *st;
@@ -1848,7 +1848,7 @@ static int av_has_duration(AVFormatContext *ic)
  *
  * Also computes the global bitrate if possible.
  */
-static void av_update_stream_timings(AVFormatContext *ic)
+static void update_stream_timings(AVFormatContext *ic)
 {
     int64_t start_time, start_time1, start_time_text, end_time, end_time1;
     int64_t duration, duration1;
@@ -1906,7 +1906,7 @@ static void fill_all_stream_timings(AVFormatContext *ic)
     int i;
     AVStream *st;
 
-    av_update_stream_timings(ic);
+    update_stream_timings(ic);
     for(i = 0;i < ic->nb_streams; i++) {
         st = ic->streams[i];
         if (st->start_time == AV_NOPTS_VALUE) {
@@ -1918,7 +1918,7 @@ static void fill_all_stream_timings(AVFormatContext *ic)
     }
 }
 
-static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
+static void estimate_timings_from_bit_rate(AVFormatContext *ic)
 {
     int64_t filesize, duration;
     int bit_rate, i;
@@ -1955,7 +1955,7 @@ static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
 #define DURATION_MAX_RETRY 3
 
 /* only usable for MPEG-PS streams */
-static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
+static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
 {
     AVPacket pkt1, *pkt = &pkt1;
     AVStream *st;
@@ -1972,7 +1972,7 @@ static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset
     for (i=0; i<ic->nb_streams; i++) {
         st = ic->streams[i];
         if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
-            av_log(st->codec, AV_LOG_WARNING, "start time is not set in av_estimate_timings_from_pts\n");
+            av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
 
         if (st->parser) {
             av_parser_close(st->parser);
@@ -2034,7 +2034,7 @@ static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset
     }
 }
 
-static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset)
+static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
 {
     int64_t file_size;
 
@@ -2052,17 +2052,17 @@ static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset)
          !strcmp(ic->iformat->name, "mpegts")) &&
         file_size && ic->pb->seekable) {
         /* get accurate estimate from the PTSes */
-        av_estimate_timings_from_pts(ic, old_offset);
-    } else if (av_has_duration(ic)) {
+        estimate_timings_from_pts(ic, old_offset);
+    } else if (has_duration(ic)) {
         /* at least one component has timings - we use them for all
            the components */
         fill_all_stream_timings(ic);
     } else {
         av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
         /* less precise: use bitrate info */
-        av_estimate_timings_from_bit_rate(ic);
+        estimate_timings_from_bit_rate(ic);
     }
-    av_update_stream_timings(ic);
+    update_stream_timings(ic);
 
 #if 0
     {
@@ -2359,7 +2359,7 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
 
         /* NOTE: a new stream can be added there if no header in file
            (AVFMTCTX_NOHEADER) */
-        ret = av_read_frame_internal(ic, &pkt1);
+        ret = read_frame_internal(ic, &pkt1);
         if (ret == AVERROR(EAGAIN))
             continue;
 
@@ -2519,7 +2519,7 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
         }
     }
 
-    av_estimate_timings(ic, old_offset);
+    estimate_timings(ic, old_offset);
 
     compute_chapters_end(ic);
 
@@ -3039,7 +3039,7 @@ int avformat_write_header(AVFormatContext *s, AVDictionary **options)
                 ret = AVERROR_INVALIDDATA;
                 goto fail;
             }
-            av_frac_init(&st->pts, 0, 0, den);
+            frac_init(&st->pts, 0, 0, den);
         }
     }
 
@@ -3117,11 +3117,11 @@ static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
            likely equal to the encoder delay, but it would be better if we
            had the real timestamps from the encoder */
         if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
-            av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
+            frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
         }
         break;
     case AVMEDIA_TYPE_VIDEO:
-        av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
+        frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
         break;
     default:
         break;
@@ -3230,7 +3230,7 @@ int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pk
  * @return 1 if a packet was output, 0 if no packet could be output,
  *         < 0 if an error occurred
  */
-static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
+static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
     if(s->oformat->interleave_packet)
         return s->oformat->interleave_packet(s, out, in, flush);
     else
@@ -3255,7 +3255,7 @@ int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
 
     for(;;){
         AVPacket opkt;
-        int ret= av_interleave_packet(s, &opkt, pkt, 0);
+        int ret= interleave_packet(s, &opkt, pkt, 0);
         if(ret<=0) //FIXME cleanup needed for ret<0 ?
             return ret;
 
@@ -3279,7 +3279,7 @@ int av_write_trailer(AVFormatContext *s)
 
     for(;;){
         AVPacket pkt;
-        ret= av_interleave_packet(s, &pkt, NULL, 1);
+        ret= interleave_packet(s, &pkt, NULL, 1);
         if(ret<0) //FIXME cleanup needed for ret<0 ?
             goto fail;
         if(!ret)