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avcodec/qoadec: add support for midstream sample rate/layout changes

This commit is contained in:
Paul B Mahol 2023-12-02 16:40:36 +01:00
parent 5230257ea1
commit 0a13178de8
1 changed files with 13 additions and 18 deletions
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31
libavcodec/qoadec.c
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@ -34,7 +34,7 @@ typedef struct QOAChannel {
} QOAChannel;
typedef struct QOAContext {
QOAChannel *ch;
QOAChannel ch[256];
} QOAContext;
static const int16_t qoa_dequant_tab[16][8] = {
@ -58,14 +58,8 @@ static const int16_t qoa_dequant_tab[16][8] = {
static av_cold int qoa_decode_init(AVCodecContext *avctx)
{
QOAContext *s = avctx->priv_data;
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
s->ch = av_calloc(avctx->ch_layout.nb_channels, sizeof(*s->ch));
if (!s->ch)
return AVERROR(ENOMEM);
return 0;
}
@ -91,17 +85,26 @@ static int qoa_decode_frame(AVCodecContext *avctx, AVFrame *frame,
int *got_frame_ptr, AVPacket *avpkt)
{
QOAContext *s = avctx->priv_data;
int ret, frame_size, nb_channels;
int ret, frame_size, nb_channels, sample_rate;
GetByteContext gb;
int16_t *samples;
bytestream2_init(&gb, avpkt->data, avpkt->size);
nb_channels = bytestream2_get_byte(&gb);
if (avctx->ch_layout.nb_channels != nb_channels)
sample_rate = bytestream2_get_be24(&gb);
if (!sample_rate || !nb_channels)
return AVERROR_INVALIDDATA;
avctx->sample_rate = bytestream2_get_be24(&gb);
if (nb_channels != avctx->ch_layout.nb_channels) {
av_channel_layout_uninit(&avctx->ch_layout);
av_channel_layout_default(&avctx->ch_layout, nb_channels);
if ((ret = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout)) < 0)
return ret;
}
frame->sample_rate = avctx->sample_rate = sample_rate;
frame->nb_samples = bytestream2_get_be16(&gb);
frame_size = bytestream2_get_be16(&gb);
if (frame_size > avpkt->size)
@ -152,13 +155,6 @@ static int qoa_decode_frame(AVCodecContext *avctx, AVFrame *frame,
return avpkt->size;
}
static av_cold int qoa_decode_end(AVCodecContext *avctx)
{
QOAContext *s = avctx->priv_data;
av_freep(&s->ch);
return 0;
}
const FFCodec ff_qoa_decoder = {
.p.name = "qoa",
CODEC_LONG_NAME("QOA (Quite OK Audio)"),
@ -167,7 +163,6 @@ const FFCodec ff_qoa_decoder = {
.priv_data_size = sizeof(QOAContext),
.init = qoa_decode_init,
FF_CODEC_DECODE_CB(qoa_decode_frame),
.close = qoa_decode_end,
.p.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
AV_CODEC_CAP_DR1,
.p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16,