Merge commit '48b24bd2d208ce0f124029ac4c5ac5cb1fca4175'

[ffmpeg] / libavcodec / ac3dec.c

diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index 1603f4f426e275c209eeaff11f1cf0ebe091d861..82345cd49dfe498e55cde5d66878a63a554072df 100644 (file)
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -29,6 +29,7 @@
 #include <math.h>
 #include <string.h>
 
+#include "libavutil/channel_layout.h"
 #include "libavutil/crc.h"
 #include "libavutil/opt.h"
 #include "internal.h"
@@ -178,11 +179,20 @@ static av_cold int ac3_decode_init(AVCodecContext *avctx)
     avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
 
     /* allow downmixing to stereo or mono */
-    if (avctx->channels > 0 && avctx->request_channels > 0 &&
-            avctx->request_channels < avctx->channels &&
-            avctx->request_channels <= 2) {
-        avctx->channels = avctx->request_channels;
-    }
+#if FF_API_REQUEST_CHANNELS
+FF_DISABLE_DEPRECATION_WARNINGS
+    if (avctx->request_channels == 1)
+        avctx->request_channel_layout = AV_CH_LAYOUT_MONO;
+    else if (avctx->request_channels == 2)
+        avctx->request_channel_layout = AV_CH_LAYOUT_STEREO;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+    if (avctx->channels > 1 &&
+        avctx->request_channel_layout == AV_CH_LAYOUT_MONO)
+        avctx->channels = 1;
+    else if (avctx->channels > 2 &&
+             avctx->request_channel_layout == AV_CH_LAYOUT_STEREO)
+        avctx->channels = 2;
     s->downmixed = 1;
 
     for (i = 0; i < AC3_MAX_CHANNELS; i++) {
@@ -251,7 +261,6 @@ static int parse_frame_header(AC3DecodeContext *s)
     s->bit_alloc_params.sr_code     = hdr.sr_code;
     s->bitstream_mode               = hdr.bitstream_mode;
     s->channel_mode                 = hdr.channel_mode;
-    s->channel_layout               = hdr.channel_layout;
     s->lfe_on                       = hdr.lfe_on;
     s->bit_alloc_params.sr_shift    = hdr.sr_shift;
     s->sample_rate                  = hdr.sample_rate;
@@ -1349,14 +1358,15 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data,
         s->output_mode  = s->channel_mode;
         if (s->lfe_on)
             s->output_mode |= AC3_OUTPUT_LFEON;
-        if (avctx->request_channels > 0 && avctx->request_channels <= 2 &&
-                avctx->request_channels < s->channels) {
-            s->out_channels = avctx->request_channels;
-            s->output_mode  = avctx->request_channels == 1 ? AC3_CHMODE_MONO : AC3_CHMODE_STEREO;
-            s->channel_layout = avpriv_ac3_channel_layout_tab[s->output_mode];
+        if (s->channels > 1 &&
+            avctx->request_channel_layout == AV_CH_LAYOUT_MONO) {
+            s->out_channels = 1;
+            s->output_mode  = AC3_CHMODE_MONO;
+        } else if (s->channels > 2 &&
+                   avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) {
+            s->out_channels = 2;
+            s->output_mode  = AC3_CHMODE_STEREO;
         }
-        avctx->channels       = s->out_channels;
-        avctx->channel_layout = s->channel_layout;
 
         s->loro_center_mix_level   = gain_levels[s->  center_mix_level];
         s->loro_surround_mix_level = gain_levels[s->surround_mix_level];
@@ -1372,6 +1382,9 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data,
         return AVERROR_INVALIDDATA;
     }
     avctx->channels = s->out_channels;
+    avctx->channel_layout = avpriv_ac3_channel_layout_tab[s->output_mode & ~AC3_OUTPUT_LFEON];
+    if (s->output_mode & AC3_OUTPUT_LFEON)
+        avctx->channel_layout |= AV_CH_LOW_FREQUENCY;
 
     /* set audio service type based on bitstream mode for AC-3 */
     avctx->audio_service_type = s->bitstream_mode;