static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) { V210DecContext *s = avctx->priv_data; int h, w, stride, aligned_input; AVFrame *pic = avctx->coded_frame; const uint8_t *psrc = avpkt->data; uint16_t *y, *u, *v; if (s->custom_stride ) stride = s->custom_stride; else { int aligned_width = ((avctx->width + 47) / 48) * 48; stride = aligned_width * 8 / 3; } aligned_input = !((uintptr_t)psrc & 0xf) && !(stride & 0xf); if (aligned_input != s->aligned_input) { s->aligned_input = aligned_input; if (HAVE_MMX) v210_x86_init(s); } if (pic->data[0]) avctx->release_buffer(avctx, pic); if (avpkt->size < stride * avctx->height) { av_log(avctx, AV_LOG_ERROR, "packet too small\n"); return -1; } pic->reference = 0; if (avctx->get_buffer(avctx, pic) < 0) return -1; y = (uint16_t*)pic->data[0]; u = (uint16_t*)pic->data[1]; v = (uint16_t*)pic->data[2]; pic->pict_type = AV_PICTURE_TYPE_I; pic->key_frame = 1; for (h = 0; h < avctx->height; h++) { const uint32_t *src = (const uint32_t*)psrc; uint32_t val; w = (avctx->width / 6) * 6; s->unpack_frame(src, y, u, v, w); y += w; u += w >> 1; v += w >> 1; src += (w << 1) / 3; if (w < avctx->width - 1) { READ_PIXELS(u, y, v); val = av_le2ne32(*src++); *y++ = val & 0x3FF; } if (w < avctx->width - 3) { *u++ = (val >> 10) & 0x3FF; *y++ = (val >> 20) & 0x3FF; val = av_le2ne32(*src++); *v++ = val & 0x3FF; *y++ = (val >> 10) & 0x3FF; } psrc += stride; y += pic->linesize[0] / 2 - avctx->width; u += pic->linesize[1] / 2 - avctx->width / 2; v += pic->linesize[2] / 2 - avctx->width / 2; } *data_size = sizeof(AVFrame); *(AVFrame*)data = *avctx->coded_frame; return avpkt->size; }