#include "avcodec.h"
#include "bytestream.h"
+#include "mathops.h"
typedef enum CinVideoBitmapIndex {
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
CinAudioContext *cin = avctx->priv_data;
- const uint8_t *src = buf;
+ const uint8_t *buf_end = buf + avpkt->size;
int16_t *samples = data;
+ int delta, out_size;
- buf_size = FFMIN(buf_size, *data_size/2);
+ out_size = (avpkt->size - cin->initial_decode_frame) *
+ av_get_bytes_per_sample(avctx->sample_fmt);
+ if (*data_size < out_size) {
+ av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n");
+ return AVERROR(EINVAL);
+ }
+ delta = cin->delta;
if (cin->initial_decode_frame) {
cin->initial_decode_frame = 0;
- cin->delta = (int16_t)AV_RL16(src); src += 2;
- *samples++ = cin->delta;
- buf_size -= 2;
+ delta = sign_extend(AV_RL16(buf), 16);
+ buf += 2;
+ *samples++ = delta;
}
- while (buf_size > 0) {
- cin->delta += cinaudio_delta16_table[*src++];
- cin->delta = av_clip_int16(cin->delta);
- *samples++ = cin->delta;
- --buf_size;
+ while (buf < buf_end) {
+ delta += cinaudio_delta16_table[*buf++];
+ delta = av_clip_int16(delta);
+ *samples++ = delta;
}
+ cin->delta = delta;
- *data_size = (uint8_t *)samples - (uint8_t *)data;
+ *data_size = out_size;
- return src - buf;
+ return avpkt->size;
}