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Code Issues Releases Activity

avcodec/rka: fix decoding uncorrelated stereo

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This commit is contained in:
Paul B Mahol 2023-02-15 14:08:28 +01:00
parent cb35036766
commit 83a2007f40
1 changed files with 30 additions and 25 deletions
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55
libavcodec/rka.c
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@ -90,6 +90,7 @@ typedef struct RKAContext {
int bps;
int align;
int channels;
int correlated;
int frame_samples;
int last_nb_samples;
uint32_t total_nb_samples;
@ -156,6 +157,7 @@ static av_cold int rka_decode_init(AVCodecContext *avctx)
s->samples_left = s->total_nb_samples = (AV_RL32(avctx->extradata + 4)) / s->align;
s->frame_samples = 131072 / s->align;
s->last_nb_samples = s->total_nb_samples % s->frame_samples;
s->correlated = avctx->extradata[15] & 1;
cmode = avctx->extradata[14] & 0xf;
if ((avctx->extradata[15] & 4) != 0)
@ -859,7 +861,7 @@ static int rka_decode_frame(AVCodecContext *avctx, AVFrame *frame,
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
if (s->channels == 2) {
if (s->channels == 2 && s->correlated) {
int16_t *l16 = (int16_t *)frame->extended_data[0];
int16_t *r16 = (int16_t *)frame->extended_data[1];
uint8_t *l8 = frame->extended_data[0];
@ -908,35 +910,38 @@ static int rka_decode_frame(AVCodecContext *avctx, AVFrame *frame,
n += ret;
}
} else {
int16_t *m16 = (int16_t *)frame->data[0];
uint8_t *m8 = frame->data[0];
for (int n = 0; n < frame->nb_samples;) {
ret = decode_ch_samples(avctx, &s->ch[0]);
if (ret == 0) {
frame->nb_samples = n;
break;
}
if (ret < 0 || n + ret > frame->nb_samples)
return AVERROR_INVALIDDATA;
for (int ch = 0; ch < s->channels; ch++) {
int16_t *m16 = (int16_t *)frame->data[ch];
uint8_t *m8 = frame->data[ch];
switch (avctx->sample_fmt) {
case AV_SAMPLE_FMT_S16P:
for (int i = 0; i < ret; i++) {
int m = s->ch[0].buf0[2560 + i];
m16[n + i] = m;
ret = decode_ch_samples(avctx, &s->ch[ch]);
if (ret == 0) {
frame->nb_samples = n;
break;
}
break;
case AV_SAMPLE_FMT_U8P:
for (int i = 0; i < ret; i++) {
int m = s->ch[0].buf0[2560 + i];
m8[n + i] = m + 0x7f;
if (ret < 0 || n + ret > frame->nb_samples)
return AVERROR_INVALIDDATA;
switch (avctx->sample_fmt) {
case AV_SAMPLE_FMT_S16P:
for (int i = 0; i < ret; i++) {
int m = s->ch[ch].buf0[2560 + i];
m16[n + i] = m;
}
break;
case AV_SAMPLE_FMT_U8P:
for (int i = 0; i < ret; i++) {
int m = s->ch[ch].buf0[2560 + i];
m8[n + i] = m + 0x7f;
}
break;
default:
return AVERROR_INVALIDDATA;
}
break;
default:
return AVERROR_INVALIDDATA;
}
n += ret;