avcodec/mpc7: return meaningful error values

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavcodec/mpc7.c

@@ -47,7 +47,7 @@ static const uint16_t quant_offsets[MPC7_QUANT_VLC_TABLES*2 + 1] =
 
 static av_cold int mpc7_decode_init(AVCodecContext * avctx)
 {
-    int i, j;
+    int i, j, ret;
     MPCContext *c = avctx->priv_data;
     GetBitContext gb;
     LOCAL_ALIGNED_16(uint8_t, buf, [16]);
@@ -66,7 +66,7 @@ static av_cold int mpc7_decode_init(AVCodecContext * avctx)
 
     if(avctx->extradata_size < 16){
         av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
     av_lfg_init(&c->rnd, 0xDEADBEEF);
@@ -81,7 +81,7 @@ static av_cold int mpc7_decode_init(AVCodecContext * avctx)
     c->maxbands = get_bits(&gb, 6);
     if(c->maxbands >= BANDS){
         av_log(avctx, AV_LOG_ERROR, "Too many bands: %i\n", c->maxbands);
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     skip_bits_long(&gb, 88);
     c->gapless = get_bits1(&gb);
@@ -97,37 +97,37 @@ static av_cold int mpc7_decode_init(AVCodecContext * avctx)
     av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
     scfi_vlc.table = scfi_table;
     scfi_vlc.table_allocated = 1 << MPC7_SCFI_BITS;
-    if(init_vlc(&scfi_vlc, MPC7_SCFI_BITS, MPC7_SCFI_SIZE,
+    if ((ret = init_vlc(&scfi_vlc, MPC7_SCFI_BITS, MPC7_SCFI_SIZE,
                 &mpc7_scfi[1], 2, 1,
-                &mpc7_scfi[0], 2, 1, INIT_VLC_USE_NEW_STATIC)){
+                &mpc7_scfi[0], 2, 1, INIT_VLC_USE_NEW_STATIC))) {
         av_log(avctx, AV_LOG_ERROR, "Cannot init SCFI VLC\n");
-        return -1;
+        return ret;
     }
     dscf_vlc.table = dscf_table;
     dscf_vlc.table_allocated = 1 << MPC7_DSCF_BITS;
-    if(init_vlc(&dscf_vlc, MPC7_DSCF_BITS, MPC7_DSCF_SIZE,
+    if ((ret = init_vlc(&dscf_vlc, MPC7_DSCF_BITS, MPC7_DSCF_SIZE,
                 &mpc7_dscf[1], 2, 1,
-                &mpc7_dscf[0], 2, 1, INIT_VLC_USE_NEW_STATIC)){
+                &mpc7_dscf[0], 2, 1, INIT_VLC_USE_NEW_STATIC))) {
         av_log(avctx, AV_LOG_ERROR, "Cannot init DSCF VLC\n");
-        return -1;
+        return ret;
     }
     hdr_vlc.table = hdr_table;
     hdr_vlc.table_allocated = 1 << MPC7_HDR_BITS;
-    if(init_vlc(&hdr_vlc, MPC7_HDR_BITS, MPC7_HDR_SIZE,
+    if ((ret = init_vlc(&hdr_vlc, MPC7_HDR_BITS, MPC7_HDR_SIZE,
                 &mpc7_hdr[1], 2, 1,
-                &mpc7_hdr[0], 2, 1, INIT_VLC_USE_NEW_STATIC)){
+                &mpc7_hdr[0], 2, 1, INIT_VLC_USE_NEW_STATIC))) {
         av_log(avctx, AV_LOG_ERROR, "Cannot init HDR VLC\n");
-        return -1;
+        return ret;
     }
     for(i = 0; i < MPC7_QUANT_VLC_TABLES; i++){
         for(j = 0; j < 2; j++){
             quant_vlc[i][j].table = &quant_tables[quant_offsets[i*2 + j]];
             quant_vlc[i][j].table_allocated = quant_offsets[i*2 + j + 1] - quant_offsets[i*2 + j];
-            if(init_vlc(&quant_vlc[i][j], 9, mpc7_quant_vlc_sizes[i],
+            if ((ret = init_vlc(&quant_vlc[i][j], 9, mpc7_quant_vlc_sizes[i],
                         &mpc7_quant_vlc[i][j][1], 4, 2,
-                        &mpc7_quant_vlc[i][j][0], 4, 2, INIT_VLC_USE_NEW_STATIC)){
+                        &mpc7_quant_vlc[i][j][0], 4, 2, INIT_VLC_USE_NEW_STATIC))) {
                 av_log(avctx, AV_LOG_ERROR, "Cannot init QUANT VLC %i,%i\n",i,j);
-                return -1;
+                return ret;
             }
         }
     }
@@ -298,7 +298,7 @@ static int mpc7_decode_frame(AVCodecContext * avctx, void *data,
     bits_avail = buf_size * 8;
     if (!last_frame && ((bits_avail < bits_used) || (bits_used + 32 <= bits_avail))) {
         av_log(avctx, AV_LOG_ERROR, "Error decoding frame: used %i of %i bits\n", bits_used, bits_avail);
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     if(c->frames_to_skip){
         c->frames_to_skip--;