flv: add support for G.711

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

libavformat/flv.h

@@ -82,6 +82,8 @@ enum {
     FLV_CODECID_NELLYMOSER_16KHZ_MONO = 4 << FLV_AUDIO_CODECID_OFFSET,
     FLV_CODECID_NELLYMOSER_8KHZ_MONO = 5 << FLV_AUDIO_CODECID_OFFSET,
     FLV_CODECID_NELLYMOSER           = 6 << FLV_AUDIO_CODECID_OFFSET,
+    FLV_CODECID_PCM_ALAW             = 7 << FLV_AUDIO_CODECID_OFFSET,
+    FLV_CODECID_PCM_MULAW            = 8 << FLV_AUDIO_CODECID_OFFSET,
     FLV_CODECID_AAC                  = 10<< FLV_AUDIO_CODECID_OFFSET,
     FLV_CODECID_SPEEX                = 11<< FLV_AUDIO_CODECID_OFFSET,
 };

libavformat/flvdec.c

@@ -108,6 +108,14 @@ static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecCo
         case FLV_CODECID_NELLYMOSER:
             acodec->codec_id = CODEC_ID_NELLYMOSER;
             break;
+        case FLV_CODECID_PCM_MULAW:
+            acodec->sample_rate = 8000;
+            acodec->codec_id = CODEC_ID_PCM_MULAW;
+            break;
+        case FLV_CODECID_PCM_ALAW:
+            acodec->sample_rate = 8000;
+            acodec->codec_id = CODEC_ID_PCM_ALAW;
+            break;
         default:
             av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
             acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;

libavformat/flvenc.c

@@ -48,6 +48,8 @@ static const AVCodecTag flv_audio_codec_ids[] = {
     { CODEC_ID_ADPCM_SWF,  FLV_CODECID_ADPCM      >> FLV_AUDIO_CODECID_OFFSET },
     { CODEC_ID_AAC,        FLV_CODECID_AAC        >> FLV_AUDIO_CODECID_OFFSET },
     { CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET },
+    { CODEC_ID_PCM_MULAW,  FLV_CODECID_PCM_MULAW  >> FLV_AUDIO_CODECID_OFFSET },
+    { CODEC_ID_PCM_ALAW,   FLV_CODECID_PCM_ALAW   >> FLV_AUDIO_CODECID_OFFSET },
     { CODEC_ID_SPEEX,      FLV_CODECID_SPEEX      >> FLV_AUDIO_CODECID_OFFSET },
     { CODEC_ID_NONE,       0 }
 };
@@ -136,6 +138,12 @@ static int get_audio_flags(AVFormatContext *s, AVCodecContext *enc)
         else
             flags |= FLV_CODECID_NELLYMOSER            | FLV_SAMPLESSIZE_16BIT;
         break;
+    case CODEC_ID_PCM_MULAW:
+        flags = FLV_CODECID_PCM_MULAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
+        break;
+    case CODEC_ID_PCM_ALAW:
+        flags = FLV_CODECID_PCM_ALAW  | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
+        break;
     case 0:
         flags |= enc->codec_tag << 4;
         break;