Add Speex support to the FLV muxer.

Originally committed as revision 20245 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/avformat.h

@@ -23,7 +23,7 @@
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
 #define LIBAVFORMAT_VERSION_MINOR 39
-#define LIBAVFORMAT_VERSION_MICRO  1
+#define LIBAVFORMAT_VERSION_MICRO  2
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \

libavformat/flvenc.c

@@ -43,6 +43,7 @@ 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_SPEEX,     FLV_CODECID_SPEEX  >> FLV_AUDIO_CODECID_OFFSET},
     {CODEC_ID_NONE,      0}
 };
 
@@ -59,7 +60,22 @@ static int get_audio_flags(AVCodecContext *enc){
 
     if (enc->codec_id == CODEC_ID_AAC) // specs force these parameters
         return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ | FLV_SAMPLESSIZE_16BIT | FLV_STEREO;
-    else {
+    else if (enc->codec_id == CODEC_ID_SPEEX) {
+        if (enc->sample_rate != 16000) {
+            av_log(enc, AV_LOG_ERROR, "flv only supports wideband (16kHz) Speex audio\n");
+            return -1;
+        }
+        if (enc->channels != 1) {
+            av_log(enc, AV_LOG_ERROR, "flv only supports mono Speex audio\n");
+            return -1;
+        }
+        if (enc->frame_size / 320 > 8) {
+            av_log(enc, AV_LOG_WARNING, "Warning: Adobe Flash Player is known "
+                                        "to have trouble with Speex streams "
+                                        "with more than 8 frames per packet.\n");
+        }
+        return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT;
+    } else {
     switch (enc->sample_rate) {
         case    44100:
             flags |= FLV_SAMPLERATE_44100HZ;