X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Froqvideodec.c;h=0ce694388f52a0b79cc354154247a93c62469594;hb=bb198c4997d5036f3bf91de51e44f807115677d0;hp=2836912f7890ef902b278ee2ea6bc52361b5239b;hpb=160228f894569e1fcdec824cb68f285d833feee0;p=ffmpeg diff --git a/libavcodec/roqvideodec.c b/libavcodec/roqvideodec.c index 2836912f789..0ce694388f5 100644 --- a/libavcodec/roqvideodec.c +++ b/libavcodec/roqvideodec.c @@ -1,39 +1,37 @@ /* * Copyright (C) 2003 the ffmpeg project * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * FFmpeg is distributed in the hope that it will be useful, + * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * */ /** - * @file roqvideodec.c - * Id RoQ Video Decoder by Dr. Tim Ferguson - * For more information about the Id RoQ format, visit: + * @file + * id RoQ Video Decoder by Dr. Tim Ferguson + * For more information about the id RoQ format, visit: * http://www.csse.monash.edu.au/~timf/ */ #include #include #include -#include #include "avcodec.h" #include "bytestream.h" -#include "dsputil.h" +#include "internal.h" #include "roqvideo.h" static void roqvideo_decode_frame(RoqContext *ri) @@ -41,16 +39,15 @@ static void roqvideo_decode_frame(RoqContext *ri) unsigned int chunk_id = 0, chunk_arg = 0; unsigned long chunk_size = 0; int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1; - int vqid, bpos, xpos, ypos, xp, yp, x, y, mx, my; + int vqid, xpos, ypos, xp, yp, x, y, mx, my; int frame_stats[2][4] = {{0},{0}}; roq_qcell *qcell; - unsigned char *buf = ri->buf; - unsigned char *buf_end = ri->buf + ri->size; + int64_t chunk_start; - while (buf < buf_end) { - chunk_id = bytestream_get_le16(&buf); - chunk_size = bytestream_get_le32(&buf); - chunk_arg = bytestream_get_le16(&buf); + while (bytestream2_get_bytes_left(&ri->gb) >= 8) { + chunk_id = bytestream2_get_le16(&ri->gb); + chunk_size = bytestream2_get_le32(&ri->gb); + chunk_arg = bytestream2_get_le16(&ri->gb); if(chunk_id == RoQ_QUAD_VQ) break; @@ -60,25 +57,26 @@ static void roqvideo_decode_frame(RoqContext *ri) if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size) nv2 = 256; for(i = 0; i < nv1; i++) { - ri->cb2x2[i].y[0] = *buf++; - ri->cb2x2[i].y[1] = *buf++; - ri->cb2x2[i].y[2] = *buf++; - ri->cb2x2[i].y[3] = *buf++; - ri->cb2x2[i].u = *buf++; - ri->cb2x2[i].v = *buf++; + ri->cb2x2[i].y[0] = bytestream2_get_byte(&ri->gb); + ri->cb2x2[i].y[1] = bytestream2_get_byte(&ri->gb); + ri->cb2x2[i].y[2] = bytestream2_get_byte(&ri->gb); + ri->cb2x2[i].y[3] = bytestream2_get_byte(&ri->gb); + ri->cb2x2[i].u = bytestream2_get_byte(&ri->gb); + ri->cb2x2[i].v = bytestream2_get_byte(&ri->gb); } for(i = 0; i < nv2; i++) for(j = 0; j < 4; j++) - ri->cb4x4[i].idx[j] = *buf++; + ri->cb4x4[i].idx[j] = bytestream2_get_byte(&ri->gb); } } - bpos = xpos = ypos = 0; - while(bpos < chunk_size) { + chunk_start = bytestream2_tell(&ri->gb); + xpos = ypos = 0; + while (bytestream2_tell(&ri->gb) < chunk_start + chunk_size) { for (yp = ypos; yp < ypos + 16; yp += 8) for (xp = xpos; xp < xpos + 16; xp += 8) { if (vqflg_pos < 0) { - vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8); + vqflg = bytestream2_get_le16(&ri->gb); vqflg_pos = 7; } vqid = (vqflg >> (vqflg_pos * 2)) & 0x3; @@ -88,17 +86,19 @@ static void roqvideo_decode_frame(RoqContext *ri) switch(vqid) { case RoQ_ID_MOT: break; - case RoQ_ID_FCC: - mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8)); - my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg); + case RoQ_ID_FCC: { + int byte = bytestream2_get_byte(&ri->gb); + mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8)); + my = 8 - (byte & 0xf) - ((signed char) chunk_arg); ff_apply_motion_8x8(ri, xp, yp, mx, my); break; + } case RoQ_ID_SLD: - qcell = ri->cb4x4 + buf[bpos++]; - ff_apply_vector_4x4(ri, xp, yp, ri->cb2x2 + qcell->idx[0]); - ff_apply_vector_4x4(ri, xp+4, yp, ri->cb2x2 + qcell->idx[1]); - ff_apply_vector_4x4(ri, xp, yp+4, ri->cb2x2 + qcell->idx[2]); - ff_apply_vector_4x4(ri, xp+4, yp+4, ri->cb2x2 + qcell->idx[3]); + qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb); + ff_apply_vector_4x4(ri, xp, yp, ri->cb2x2 + qcell->idx[0]); + ff_apply_vector_4x4(ri, xp + 4, yp, ri->cb2x2 + qcell->idx[1]); + ff_apply_vector_4x4(ri, xp, yp + 4, ri->cb2x2 + qcell->idx[2]); + ff_apply_vector_4x4(ri, xp + 4, yp + 4, ri->cb2x2 + qcell->idx[3]); break; case RoQ_ID_CCC: for (k = 0; k < 4; k++) { @@ -107,8 +107,7 @@ static void roqvideo_decode_frame(RoqContext *ri) if(k & 0x02) y += 4; if (vqflg_pos < 0) { - vqflg = buf[bpos++]; - vqflg |= (buf[bpos++] << 8); + vqflg = bytestream2_get_le16(&ri->gb); vqflg_pos = 7; } vqid = (vqflg >> (vqflg_pos * 2)) & 0x3; @@ -117,24 +116,25 @@ static void roqvideo_decode_frame(RoqContext *ri) switch(vqid) { case RoQ_ID_MOT: break; - case RoQ_ID_FCC: - mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8)); - my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg); + case RoQ_ID_FCC: { + int byte = bytestream2_get_byte(&ri->gb); + mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8)); + my = 8 - (byte & 0xf) - ((signed char) chunk_arg); ff_apply_motion_4x4(ri, x, y, mx, my); break; + } case RoQ_ID_SLD: - qcell = ri->cb4x4 + buf[bpos++]; - ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + qcell->idx[0]); - ff_apply_vector_2x2(ri, x+2, y, ri->cb2x2 + qcell->idx[1]); - ff_apply_vector_2x2(ri, x, y+2, ri->cb2x2 + qcell->idx[2]); - ff_apply_vector_2x2(ri, x+2, y+2, ri->cb2x2 + qcell->idx[3]); + qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb); + ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + qcell->idx[0]); + ff_apply_vector_2x2(ri, x + 2, y, ri->cb2x2 + qcell->idx[1]); + ff_apply_vector_2x2(ri, x, y + 2, ri->cb2x2 + qcell->idx[2]); + ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + qcell->idx[3]); break; case RoQ_ID_CCC: - ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + buf[bpos]); - ff_apply_vector_2x2(ri, x+2, y, ri->cb2x2 + buf[bpos+1]); - ff_apply_vector_2x2(ri, x, y+2, ri->cb2x2 + buf[bpos+2]); - ff_apply_vector_2x2(ri, x+2, y+2, ri->cb2x2 + buf[bpos+3]); - bpos += 4; + ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + bytestream2_get_byte(&ri->gb)); + ff_apply_vector_2x2(ri, x + 2, y, ri->cb2x2 + bytestream2_get_byte(&ri->gb)); + ff_apply_vector_2x2(ri, x, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb)); + ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb)); break; } } @@ -145,48 +145,69 @@ static void roqvideo_decode_frame(RoqContext *ri) } xpos += 16; - if (xpos >= ri->avctx->width) { - xpos -= ri->avctx->width; + if (xpos >= ri->width) { + xpos -= ri->width; ypos += 16; } - if(ypos >= ri->avctx->height) + if(ypos >= ri->height) break; } } -static int roq_decode_init(AVCodecContext *avctx) +static av_cold int roq_decode_init(AVCodecContext *avctx) { RoqContext *s = avctx->priv_data; s->avctx = avctx; - s->last_frame = &s->frames[0]; - s->current_frame = &s->frames[1]; - avctx->pix_fmt = PIX_FMT_YUV444P; - dsputil_init(&s->dsp, avctx); + + if (avctx->width % 16 || avctx->height % 16) { + av_log(avctx, AV_LOG_ERROR, + "Dimensions must be a multiple of 16\n"); + return AVERROR_PATCHWELCOME; + } + + s->width = avctx->width; + s->height = avctx->height; + + s->last_frame = av_frame_alloc(); + s->current_frame = av_frame_alloc(); + if (!s->current_frame || !s->last_frame) { + av_frame_free(&s->current_frame); + av_frame_free(&s->last_frame); + return AVERROR(ENOMEM); + } + + avctx->pix_fmt = AV_PIX_FMT_YUV444P; return 0; } static int roq_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) + void *data, int *got_frame, + AVPacket *avpkt) { + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; RoqContext *s = avctx->priv_data; + int copy= !s->current_frame->data[0]; + int ret; - if (avctx->reget_buffer(avctx, s->current_frame)) { + if ((ret = ff_reget_buffer(avctx, s->current_frame)) < 0) { av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n"); - return -1; + return ret; } - s->y_stride = s->current_frame->linesize[0]; - s->c_stride = s->current_frame->linesize[1]; - s->buf = buf; - s->size = buf_size; + if(copy) + av_picture_copy((AVPicture*)s->current_frame, (AVPicture*)s->last_frame, + avctx->pix_fmt, avctx->width, avctx->height); + + bytestream2_init(&s->gb, buf, buf_size); roqvideo_decode_frame(s); - *data_size = sizeof(AVFrame); - *(AVFrame*)data = *s->current_frame; + if ((ret = av_frame_ref(data, s->current_frame)) < 0) + return ret; + *got_frame = 1; /* shuffle frames */ FFSWAP(AVFrame *, s->current_frame, s->last_frame); @@ -194,27 +215,24 @@ static int roq_decode_frame(AVCodecContext *avctx, return buf_size; } -static int roq_decode_end(AVCodecContext *avctx) +static av_cold int roq_decode_end(AVCodecContext *avctx) { RoqContext *s = avctx->priv_data; - /* release the last frame */ - if (s->last_frame->data[0]) - avctx->release_buffer(avctx, s->last_frame); - if (s->current_frame->data[0]) - avctx->release_buffer(avctx, s->current_frame); + av_frame_free(&s->current_frame); + av_frame_free(&s->last_frame); return 0; } -AVCodec roq_decoder = { - "roqvideo", - CODEC_TYPE_VIDEO, - CODEC_ID_ROQ, - sizeof(RoqContext), - roq_decode_init, - NULL, - roq_decode_end, - roq_decode_frame, - CODEC_CAP_DR1, +AVCodec ff_roq_decoder = { + .name = "roqvideo", + .long_name = NULL_IF_CONFIG_SMALL("id RoQ video"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_ROQ, + .priv_data_size = sizeof(RoqContext), + .init = roq_decode_init, + .close = roq_decode_end, + .decode = roq_decode_frame, + .capabilities = AV_CODEC_CAP_DR1, };