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[xcode] Produce correctly sized ALAC frames 

With ffmpeg < 6, using av_buffersink_set_frame_size() with the codecs frame
size means we no longer the frame size of 352 that Airplay requires.
This commit is contained in:
ejurgensen 2023-11-26 09:47:48 +01:00
parent 3ee9204ff8
commit 85e9b06bca
1 changed files with 4 additions and 5 deletions
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9
src/transcode.c
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@ -48,7 +48,6 @@
#define USE_CONST_AVCODEC (LIBAVFORMAT_VERSION_MAJOR > 59) || ((LIBAVFORMAT_VERSION_MAJOR == 59) && (LIBAVFORMAT_VERSION_MINOR > 15))
#define USE_NO_CLEAR_AVFMT_NOFILE (LIBAVFORMAT_VERSION_MAJOR > 59) || ((LIBAVFORMAT_VERSION_MAJOR == 59) && (LIBAVFORMAT_VERSION_MINOR > 15))
#define USE_CH_LAYOUT (LIBAVCODEC_VERSION_MAJOR > 59) || ((LIBAVCODEC_VERSION_MAJOR == 59) && (LIBAVCODEC_VERSION_MINOR > 24))
#define USE_ALAC_FRAME_SIZE_HACK (LIBAVCODEC_VERSION_MAJOR > 59) || ((LIBAVCODEC_VERSION_MAJOR == 59) && (LIBAVCODEC_VERSION_MINOR > 31))
// Interval between ICY metadata checks for streams, in seconds
#define METADATA_ICY_INTERVAL 5
@ -97,6 +96,7 @@ struct settings_ctx
int channels;
#endif
int bit_rate;
int frame_size;
enum AVSampleFormat sample_format;
bool with_wav_header;
bool with_icy;
@ -286,6 +286,7 @@ init_settings(struct settings_ctx *settings, enum transcode_profile profile, str
settings->format = "data"; // Means we get the raw packet from the encoder, no muxing
settings->audio_codec = AV_CODEC_ID_ALAC;
settings->sample_format = AV_SAMPLE_FMT_S16P;
settings->frame_size = 352;
break;
case XCODE_OGG:
@ -572,10 +573,8 @@ stream_add(struct encode_ctx *ctx, struct stream_ctx *s, enum AVCodecID codec_id
// frame capability). This worked with no issues until ffmpeg 6, where it
// seems a frame size check was added. The below circumvents the check, but is
// dirty because we shouldn't be writing to this data element.
#if USE_ALAC_FRAME_SIZE_HACK
if (codec_id == AV_CODEC_ID_ALAC)
s->codec->frame_size = 352;
#endif
if (ctx->settings.frame_size)
s->codec->frame_size = ctx->settings.frame_size;
// Copy the codec parameters we just set to the stream, so the muxer knows them
ret = avcodec_parameters_from_context(s->stream->codecpar, s->codec);