static int adx_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
int buf_size = avpkt->size;
ADXContext *c = (ADXContext *)avctx->priv_data;
int16_t *samples;
const uint8_t *buf = avpkt->data;
int num_blocks, ch, ret;
if (c->eof) {
*got_frame_ptr = 0;
return buf_size;
}
if (!c->header_parsed && buf_size >= 2 && AV_RB16(buf) == 0x8000) {
int header_size;
if ((ret = avpriv_adx_decode_header(avctx, buf, buf_size, &header_size,
c->coeff)) < 0) {
av_log(avctx, AV_LOG_ERROR, "error parsing ADX header\n");
return AVERROR_INVALIDDATA;
}
c->channels = avctx->channels;
c->header_parsed = 1;
if (buf_size < header_size)
return AVERROR_INVALIDDATA;
buf += header_size;
buf_size -= header_size;
}
if (!c->header_parsed)
return AVERROR_INVALIDDATA;
/* calculate number of blocks in the packet */
num_blocks = buf_size / (BLOCK_SIZE * c->channels);
/* if the packet is not an even multiple of BLOCK_SIZE, check for an EOF
packet */
if (!num_blocks || buf_size % (BLOCK_SIZE * avctx->channels)) {
if (buf_size >= 4 && (AV_RB16(buf) & 0x8000)) {
c->eof = 1;
*got_frame_ptr = 0;
return avpkt->size;
}
return AVERROR_INVALIDDATA;
}
/* get output buffer */
c->frame.nb_samples = num_blocks * BLOCK_SAMPLES;
if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
samples = (int16_t *)c->frame.data[0];
while (num_blocks--) {
for (ch = 0; ch < c->channels; ch++) {
if (adx_decode(c, samples + ch, buf, ch)) {
c->eof = 1;
buf = avpkt->data + avpkt->size;
break;
}
buf_size -= BLOCK_SIZE;
buf += BLOCK_SIZE;
}
samples += BLOCK_SAMPLES * c->channels;
}
*got_frame_ptr = 1;
*(AVFrame *)data = c->frame;
return buf - avpkt->data;
}
static int adx_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
AVFrame *frame = data;
int buf_size = avpkt->size;
ADXContext *c = avctx->priv_data;
int16_t **samples;
int samples_offset;
const uint8_t *buf = avpkt->data;
const uint8_t *buf_end = buf + avpkt->size;
int num_blocks, ch, ret;
if (c->eof) {
*got_frame_ptr = 0;
return buf_size;
}
if (!c->header_parsed && buf_size >= 2 && AV_RB16(buf) == 0x8000) {
int header_size;
if ((ret = ff_adx_decode_header(avctx, buf, buf_size, &header_size,
c->coeff)) < 0) {
av_log(avctx, AV_LOG_ERROR, "error parsing ADX header\n");
return AVERROR_INVALIDDATA;
}
c->channels = avctx->channels;
c->header_parsed = 1;
if (buf_size < header_size)
return AVERROR_INVALIDDATA;
buf += header_size;
buf_size -= header_size;
}
if (!c->header_parsed)
return AVERROR_INVALIDDATA;
/* calculate number of blocks in the packet */
num_blocks = buf_size / (BLOCK_SIZE * c->channels);
/* if the packet is not an even multiple of BLOCK_SIZE, check for an EOF
packet */
if (!num_blocks || buf_size % (BLOCK_SIZE * avctx->channels)) {
if (buf_size >= 4 && (AV_RB16(buf) & 0x8000)) {
c->eof = 1;
*got_frame_ptr = 0;
return avpkt->size;
}
return AVERROR_INVALIDDATA;
}
/* get output buffer */
frame->nb_samples = num_blocks * BLOCK_SAMPLES;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
samples = (int16_t **)frame->extended_data;
samples_offset = 0;
while (num_blocks--) {
for (ch = 0; ch < c->channels; ch++) {
if (buf_end - buf < BLOCK_SIZE || adx_decode(c, samples[ch], samples_offset, buf, ch)) {
c->eof = 1;
buf = avpkt->data + avpkt->size;
break;
}
buf_size -= BLOCK_SIZE;
buf += BLOCK_SIZE;
}
if (!c->eof)
samples_offset += BLOCK_SAMPLES;
}
frame->nb_samples = samples_offset;
*got_frame_ptr = 1;
return buf - avpkt->data;
}
