Merge commit '1fb8f6a4'

* commit '1fb8f6a4':
  x86: lavr: add SSE2 quantize() for dithering
  doc/APIchanges: fill in missing dates and hashes.
  rtpdec_vp8: Request a keyframe if RTP packets are lost

Conflicts:
	doc/APIchanges
Merged-by: Michael Niedermayer <michaelni@gmx.at>

doc/APIchanges

@@ -132,34 +132,34 @@ API changes, most recent first:
 2012-03-26 - a67d9cf - lavfi 2.66.100
   Add avfilter_fill_frame_from_{audio_,}buffer_ref() functions.
 
-2013-xx-xx - xxxxxxx - lavr 1.1.0
+2013-01-07 - 074a00d - lavr 1.1.0
   Add avresample_set_channel_mapping() for input channel reordering,
   duplication, and silencing.
 
-2012-xx-xx - xxxxxxx - lavu 52.2.1 - avstring.h
+2012-12-29 - d8fd06c - lavu 52.2.1 - avstring.h
   Add av_basename() and av_dirname().
 
-2012-11-10 - 5980f5dd - lavu 52.2.0 - audioconvert.h
+2012-11-11 - 5980f5d - lavu 52.2.0 - audioconvert.h
   Rename audioconvert.h to channel_layout.h. audioconvert.h is now deprecated.
 
-2012-10-26 - dfde8a34 - lavu 52.1.0 - intmath.h
-  Add av_ctz() for trailing zero bit count.
+2012-11-05 - dfde8a3 - lavu 52.1.0 - intmath.h
+  Add av_ctz() for trailing zero bit count
 
-2012-10-18 - a893655b - lavu 51.45.0 - error.h
-  Add AVERROR_EXPERIMENTAL.
+2012-10-21 - a893655 - lavu 51.45.0 - error.h
+  Add AVERROR_EXPERIMENTAL
 
-2012-10-12 - d2fcb356 - lavu 51.44.0 - pixdesc.h
+2012-10-12 - d2fcb35 - lavu 51.44.0 - pixdesc.h
   Add functions for accessing pixel format descriptors.
   Accessing the av_pix_fmt_descriptors array directly is now
   deprecated.
 
-2012-10-11 - 9a92aea2 - lavu 51.43.0 - aes.h, md5.h, sha.h, tree.h
+2012-10-11 - 9a92aea - lavu 51.43.0 - aes.h, md5.h, sha.h, tree.h
   Add functions for allocating the opaque contexts for the algorithms,
 
-2012-10-10 - b522000e - lavf 54.18.0 - avio.h
+2012-10-10 - b522000 - lavf 54.18.0 - avio.h
   Add avio_closep to complement avio_close.
 
-2012-10-06 - 78071a14 - lavu 51.42.0 - pixfmt.h
+2012-10-08 - 78071a1 - lavu 51.42.0 - pixfmt.h
   Rename PixelFormat to AVPixelFormat and all PIX_FMT_* to AV_PIX_FMT_*.
   To provide backwards compatibility, PixelFormat is now #defined as
   AVPixelFormat.

libavformat/rtpdec_vp8.c

@@ -35,11 +35,21 @@ struct PayloadContext {
     AVIOContext *data;
     uint32_t     timestamp;
     int          is_keyframe;
+    /* If sequence_ok is set, we keep returning data (even if we might have
+     * lost some data, but we haven't lost any too critical data that would
+     * cause the decoder to desynchronize and output random garbage).
+     */
     int          sequence_ok;
     int          first_part_size;
     uint16_t     prev_seq;
     int          prev_pictureid;
     int          broken_frame;
+    /* If sequence_dirty is set, we have lost some data (critical or
+     * non-critical) and decoding will have some sort of artefacts, and
+     * we thus should request a new keyframe.
+     */
+    int          sequence_dirty;
+    int          got_keyframe;
 };
 
 static void vp8_free_buffer(PayloadContext *vp8)
@@ -141,11 +151,15 @@ static int vp8_handle_packet(AVFormatContext *ctx, PayloadContext *vp8,
             vp8_free_buffer(vp8);
             // Keyframe, decoding ok again
             vp8->sequence_ok = 1;
+            vp8->sequence_dirty = 0;
+            vp8->got_keyframe = 1;
         } else {
             int can_continue = vp8->data && !vp8->is_keyframe &&
                                avio_tell(vp8->data) >= vp8->first_part_size;
             if (!vp8->sequence_ok)
                 return AVERROR(EAGAIN);
+            if (!vp8->got_keyframe)
+                return vp8_broken_sequence(ctx, vp8, "Keyframe missing\n");
             if (pictureid >= 0) {
                 if (pictureid != ((vp8->prev_pictureid + 1) & pictureid_mask)) {
                     return vp8_broken_sequence(ctx, vp8,
@@ -179,6 +193,7 @@ static int vp8_handle_packet(AVFormatContext *ctx, PayloadContext *vp8,
                 }
             }
             if (vp8->data) {
+                vp8->sequence_dirty = 1;
                 if (avio_tell(vp8->data) >= vp8->first_part_size) {
                     int ret = ff_rtp_finalize_packet(pkt, &vp8->data, st->index);
                     if (ret < 0)
@@ -220,6 +235,7 @@ static int vp8_handle_packet(AVFormatContext *ctx, PayloadContext *vp8,
                                            "Missed part of a keyframe, sequence broken\n");
             } else if (vp8->data && avio_tell(vp8->data) >= vp8->first_part_size) {
                 vp8->broken_frame = 1;
+                vp8->sequence_dirty = 1;
             } else {
                 return vp8_broken_sequence(ctx, vp8,
                                            "Missed part of the first partition, sequence broken\n");
@@ -253,7 +269,11 @@ static int vp8_handle_packet(AVFormatContext *ctx, PayloadContext *vp8,
 
 static PayloadContext *vp8_new_context(void)
 {
-    return av_mallocz(sizeof(PayloadContext));
+    PayloadContext *vp8 = av_mallocz(sizeof(PayloadContext));
+    if (!vp8)
+        return NULL;
+    vp8->sequence_ok = 1;
+    return vp8;
 }
 
 static void vp8_free_context(PayloadContext *vp8)
@@ -262,6 +282,11 @@ static void vp8_free_context(PayloadContext *vp8)
     av_free(vp8);
 }
 
+static int vp8_need_keyframe(PayloadContext *vp8)
+{
+    return vp8->sequence_dirty || !vp8->sequence_ok;
+}
+
 RTPDynamicProtocolHandler ff_vp8_dynamic_handler = {
     .enc_name       = "VP8",
     .codec_type     = AVMEDIA_TYPE_VIDEO,
@@ -269,4 +294,5 @@ RTPDynamicProtocolHandler ff_vp8_dynamic_handler = {
     .alloc          = vp8_new_context,
     .free           = vp8_free_context,
     .parse_packet   = vp8_handle_packet,
+    .need_keyframe  = vp8_need_keyframe,
 };

libavresample/dither.c

@@ -336,6 +336,9 @@ static void dither_init(DitherDSPContext *ddsp,
         ddsp->dither_int_to_float = dither_int_to_float_rectangular_c;
     else
         ddsp->dither_int_to_float = dither_int_to_float_triangular_c;
+
+    if (ARCH_X86)
+        ff_dither_init_x86(ddsp, method);
 }
 
 DitherContext *ff_dither_alloc(AVAudioResampleContext *avr,

libavresample/dither.h

@@ -85,4 +85,9 @@ void ff_dither_free(DitherContext **c);
  */
 int ff_convert_dither(DitherContext *c, AudioData *dst, AudioData *src);
 
+/* arch-specific initialization functions */
+
+void ff_dither_init_x86(DitherDSPContext *ddsp,
+                        enum AVResampleDitherMethod method);
+
 #endif /* AVRESAMPLE_DITHER_H */

libavresample/x86/Makefile

 OBJS      += x86/audio_convert_init.o                                   \
              x86/audio_mix_init.o                                       \
+             x86/dither_init.o                                          \
 
 YASM-OBJS += x86/audio_convert.o                                        \
              x86/audio_mix.o                                            \
+             x86/dither.o                                               \

libavresample/x86/dither.asm

+;******************************************************************************
+;* x86 optimized dithering format conversion
+;* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
+;*
+;* This file is part of FFmpeg.
+;*
+;* FFmpeg is free software; you can redistribute it and/or
+;* modify it under the terms of the GNU Lesser General Public
+;* License as published by the Free Software Foundation; either
+;* version 2.1 of the License, or (at your option) any later version.
+;*
+;* FFmpeg is distributed in the hope that it will be useful,
+;* but WITHOUT ANY WARRANTY; without even the implied warranty of
+;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;* Lesser General Public License for more details.
+;*
+;* You should have received a copy of the GNU Lesser General Public
+;* License along with FFmpeg; if not, write to the Free Software
+;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+;******************************************************************************
+
+%include "libavutil/x86/x86util.asm"
+
+SECTION_RODATA 32
+
+pf_s16_scale: times 4 dd 32753.0
+
+SECTION_TEXT
+
+;------------------------------------------------------------------------------
+; void ff_quantize(int16_t *dst, float *src, float *dither, int len);
+;------------------------------------------------------------------------------
+
+INIT_XMM sse2
+cglobal quantize, 4,4,3, dst, src, dither, len
+    lea         lenq, [2*lend]
+    add         dstq, lenq
+    lea         srcq, [srcq+2*lenq]
+    lea      ditherq, [ditherq+2*lenq]
+    neg         lenq
+    mova          m2, [pf_s16_scale]
+.loop:
+    mulps         m0, m2, [srcq+2*lenq]
+    mulps         m1, m2, [srcq+2*lenq+mmsize]
+    addps         m0, [ditherq+2*lenq]
+    addps         m1, [ditherq+2*lenq+mmsize]
+    cvtps2dq      m0, m0
+    cvtps2dq      m1, m1
+    packssdw      m0, m1
+    mova     [dstq+lenq], m0
+    add         lenq, mmsize
+    jl .loop
+    REP_RET

libavresample/x86/dither_init.c

+/*
+ * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "libavutil/cpu.h"
+#include "libavutil/x86/cpu.h"
+#include "libavresample/dither.h"
+
+extern void ff_quantize_sse2(int16_t *dst, const float *src, float *dither,
+                             int len);
+
+av_cold void ff_dither_init_x86(DitherDSPContext *ddsp,
+                                enum AVResampleDitherMethod method)
+{
+    int mm_flags = av_get_cpu_flags();
+
+    if (EXTERNAL_SSE2(mm_flags)) {
+        ddsp->quantize      = ff_quantize_sse2;
+        ddsp->ptr_align     = 16;
+        ddsp->samples_align = 8;
+    }
+}