@@ -297,6 +297,25 @@ static int ffat_set_extradata(AVCodecContext *avctx)
return 0;
}
+static bool ffat_get_format_is_float(enum AVCodecID codec)
+{
+ switch (codec) {
+ case AV_CODEC_ID_AAC:
+ case AV_CODEC_ID_AC3:
+ case AV_CODEC_ID_AMR_NB:
+ case AV_CODEC_ID_EAC3:
+ case AV_CODEC_ID_ILBC:
+ case AV_CODEC_ID_MP1:
+ case AV_CODEC_ID_MP2:
+ case AV_CODEC_ID_MP3:
+ case AV_CODEC_ID_QDMC:
+ case AV_CODEC_ID_QDM2:
+ return true;
+ default:
+ return false;
+ }
+}
+
static av_cold int ffat_create_decoder(AVCodecContext *avctx,
const AVPacket *pkt)
{
@@ -304,8 +323,12 @@ static av_cold int ffat_create_decoder(AVCodecContext *avctx,
OSStatus status;
int i;
- enum AVSampleFormat sample_fmt = (avctx->bits_per_raw_sample == 32) ?
- AV_SAMPLE_FMT_S32 : AV_SAMPLE_FMT_S16;
+ bool sample_fmt_is_float = ffat_get_format_is_float(avctx->codec_id);
+
+ enum AVSampleFormat sample_fmt = sample_fmt_is_float ?
+ AV_SAMPLE_FMT_FLT :
+ ((avctx->bits_per_raw_sample == 32) ?
+ AV_SAMPLE_FMT_S32 : AV_SAMPLE_FMT_S16);
AudioStreamBasicDescription in_format = {
.mFormatID = ffat_get_format_id(avctx->codec_id, avctx->profile),
@@ -313,7 +336,10 @@ static av_cold int ffat_create_decoder(AVCodecContext *avctx,
};
AudioStreamBasicDescription out_format = {
.mFormatID = kAudioFormatLinearPCM,
- .mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked,
+ .mFormatFlags = (sample_fmt_is_float ?
+ kAudioFormatFlagIsFloat :
+ kAudioFormatFlagIsSignedInteger) |
+ kAudioFormatFlagIsPacked,
.mFramesPerPacket = 1,
.mBitsPerChannel = av_get_bytes_per_sample(sample_fmt) * 8,
};
@@ -471,7 +497,9 @@ static OSStatus ffat_decode_callback(AudioConverterRef converter, UInt32 *nb_pac
static void ffat_copy_samples(AVCodecContext *avctx, AVFrame *frame)
{
ATDecodeContext *at = avctx->priv_data;
- if (avctx->sample_fmt == AV_SAMPLE_FMT_S32) {
+ if (avctx->sample_fmt == AV_SAMPLE_FMT_FLT) {
+ COPY_SAMPLES(float);
+ } else if (avctx->sample_fmt == AV_SAMPLE_FMT_S32) {
COPY_SAMPLES(int32_t);
} else {
COPY_SAMPLES(int16_t);
These candidate formats are likely already decoded in floating point internally anyway, so request float output so that it's also possible to clip or peak level as necessary. Signed-off-by: Christopher Snowhill <kode54@gmail.com> --- libavcodec/audiotoolboxdec.c | 36 ++++++++++++++++++++++++++++++++---- 1 file changed, 32 insertions(+), 4 deletions(-)