static int roq_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet) { RoqContext *enc = avctx->priv_data; int size, ret; enc->avctx = avctx; enc->frame_to_enc = frame; if (frame->quality) enc->lambda = frame->quality - 1; else enc->lambda = 2*ROQ_LAMBDA_SCALE; /* 138 bits max per 8x8 block + * 256 codebooks*(6 bytes 2x2 + 4 bytes 4x4) + 8 bytes frame header */ size = ((enc->width * enc->height / 64) * 138 + 7) / 8 + 256 * (6 + 4) + 8; if ((ret = ff_alloc_packet(pkt, size)) < 0) { av_log(avctx, AV_LOG_ERROR, "Error getting output packet with size %d.\n", size); return ret; } enc->out_buf = pkt->data; /* Check for I frame */ if (enc->framesSinceKeyframe == avctx->gop_size) enc->framesSinceKeyframe = 0; if (enc->first_frame) { /* Alloc memory for the reconstruction data (we must know the stride for that) */ if (ff_get_buffer(avctx, enc->current_frame, 0) || ff_get_buffer(avctx, enc->last_frame, 0)) { av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n"); return -1; } /* Before the first video frame, write a "video info" chunk */ roq_write_video_info_chunk(enc); enc->first_frame = 0; } /* Encode the actual frame */ roq_encode_video(enc); pkt->size = enc->out_buf - pkt->data; if (enc->framesSinceKeyframe == 1) pkt->flags |= AV_PKT_FLAG_KEY; *got_packet = 1; return 0; }