static int adx_parse(AVCodecParserContext *s1, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size) { ADXParseContext *s = s1->priv_data; ParseContext *pc = &s->pc; int next = END_NOT_FOUND; if (!avctx->extradata_size) { int ret; ff_combine_frame(pc, END_NOT_FOUND, &buf, &buf_size); if (!s->header_size && pc->index >= MIN_HEADER_SIZE) { if (ret = avpriv_adx_decode_header(avctx, pc->buffer, pc->index, &s->header_size, NULL)) return AVERROR_INVALIDDATA; s->block_size = BLOCK_SIZE * avctx->channels; } if (s->header_size && s->header_size <= pc->index) { avctx->extradata = av_mallocz(s->header_size + FF_INPUT_BUFFER_PADDING_SIZE); if (!avctx->extradata) return AVERROR(ENOMEM); avctx->extradata_size = s->header_size; memcpy(avctx->extradata, pc->buffer, s->header_size); memmove(pc->buffer, pc->buffer + s->header_size, s->header_size); pc->index -= s->header_size; } *poutbuf = NULL; *poutbuf_size = 0; return buf_size; } if (pc->index - s->buf_pos >= s->block_size) { *poutbuf = &pc->buffer[s->buf_pos]; *poutbuf_size = s->block_size; s->buf_pos += s->block_size; return 0; } if (pc->index && s->buf_pos) { memmove(pc->buffer, &pc->buffer[s->buf_pos], pc->index - s->buf_pos); pc->index -= s->buf_pos; s->buf_pos = 0; } if (buf_size + pc->index >= s->block_size) next = s->block_size - pc->index; if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) { *poutbuf = NULL; *poutbuf_size = 0; return buf_size; } *poutbuf = buf; *poutbuf_size = buf_size; return next; }