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015903294c
* qatar/master: (25 commits) rv40dsp x86: MMX/MMX2/3DNow/SSE2/SSSE3 implementations of MC ape: Use unsigned integer maths arm: dsputil: fix overreads in put/avg_pixels functions h264: K&R formatting cosmetics for header files (part II/II) h264: K&R formatting cosmetics for header files (part I/II) rtmp: Implement check bandwidth notification. rtmp: Support 'rtmp_swfurl', an option which specifies the URL of the SWF player. rtmp: Support 'rtmp_flashver', an option which overrides the version of the Flash plugin. rtmp: Support 'rtmp_tcurl', an option which overrides the URL of the target stream. cmdutils: Add fallback case to switch in check_stream_specifier(). sctp: be consistent with socket option level configure: Add _XOPEN_SOURCE=600 to Solaris preprocessor flags. vcr1enc: drop pointless empty encode_init() wrapper function vcr1: drop pointless write-only AVCodecContext member from VCR1Context vcr1: group encoder code together to save #ifdefs vcr1: cosmetics: K&R prettyprinting, typos, parentheses, dead code, comments mov: make one comment slightly more specific lavr: replace the SSE version of ff_conv_fltp_to_flt_6ch() with SSE4 and AVX lavfi: move audio-related functions to a separate file. lavfi: remove some audio-related function from public API. ... Conflicts: cmdutils.c libavcodec/h264.h libavcodec/h264_mvpred.h libavcodec/vcr1.c libavfilter/avfilter.c libavfilter/avfilter.h libavfilter/defaults.c libavfilter/internal.h Merged-by: Michael Niedermayer <michaelni@gmx.at>
191 lines
5.6 KiB
C
191 lines
5.6 KiB
C
/*
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* ATI VCR1 codec
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* Copyright (c) 2003 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* ATI VCR1 codec
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*/
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#include "avcodec.h"
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#include "dsputil.h"
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typedef struct VCR1Context {
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AVFrame picture;
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int delta[16];
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int offset[4];
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} VCR1Context;
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static av_cold void common_init(AVCodecContext *avctx)
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{
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VCR1Context *const a = avctx->priv_data;
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avctx->coded_frame = &a->picture;
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avcodec_get_frame_defaults(&a->picture);
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}
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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common_init(avctx);
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avctx->pix_fmt = PIX_FMT_YUV410P;
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return 0;
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}
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static av_cold int decode_end(AVCodecContext *avctx)
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{
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VCR1Context *s = avctx->priv_data;
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if (s->picture.data[0])
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avctx->release_buffer(avctx, &s->picture);
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return 0;
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}
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static int decode_frame(AVCodecContext *avctx, void *data,
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int *data_size, AVPacket *avpkt)
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{
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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VCR1Context *const a = avctx->priv_data;
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AVFrame *picture = data;
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AVFrame *const p = &a->picture;
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const uint8_t *bytestream = buf;
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int i, x, y;
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if (p->data[0])
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avctx->release_buffer(avctx, p);
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if(buf_size < 16 + avctx->height + avctx->width*avctx->height*5/8){
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av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
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return AVERROR(EINVAL);
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}
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p->reference = 0;
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if (avctx->get_buffer(avctx, p) < 0) {
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return -1;
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}
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p->pict_type = AV_PICTURE_TYPE_I;
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p->key_frame = 1;
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for (i = 0; i < 16; i++) {
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a->delta[i] = *bytestream++;
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bytestream++;
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}
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for (y = 0; y < avctx->height; y++) {
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int offset;
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uint8_t *luma = &a->picture.data[0][y * a->picture.linesize[0]];
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if ((y & 3) == 0) {
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uint8_t *cb = &a->picture.data[1][(y >> 2) * a->picture.linesize[1]];
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uint8_t *cr = &a->picture.data[2][(y >> 2) * a->picture.linesize[2]];
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for (i = 0; i < 4; i++)
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a->offset[i] = *bytestream++;
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offset = a->offset[0] - a->delta[bytestream[2] & 0xF];
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for (x = 0; x < avctx->width; x += 4) {
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luma[0] = offset += a->delta[bytestream[2] & 0xF];
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luma[1] = offset += a->delta[bytestream[2] >> 4];
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luma[2] = offset += a->delta[bytestream[0] & 0xF];
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luma[3] = offset += a->delta[bytestream[0] >> 4];
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luma += 4;
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*cb++ = bytestream[3];
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*cr++ = bytestream[1];
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bytestream += 4;
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}
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} else {
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offset = a->offset[y & 3] - a->delta[bytestream[2] & 0xF];
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for (x = 0; x < avctx->width; x += 8) {
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luma[0] = offset += a->delta[bytestream[2] & 0xF];
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luma[1] = offset += a->delta[bytestream[2] >> 4];
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luma[2] = offset += a->delta[bytestream[3] & 0xF];
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luma[3] = offset += a->delta[bytestream[3] >> 4];
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luma[4] = offset += a->delta[bytestream[0] & 0xF];
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luma[5] = offset += a->delta[bytestream[0] >> 4];
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luma[6] = offset += a->delta[bytestream[1] & 0xF];
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luma[7] = offset += a->delta[bytestream[1] >> 4];
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luma += 8;
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bytestream += 4;
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}
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}
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}
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*picture = a->picture;
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*data_size = sizeof(AVPicture);
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return buf_size;
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}
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AVCodec ff_vcr1_decoder = {
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.name = "vcr1",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = CODEC_ID_VCR1,
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.priv_data_size = sizeof(VCR1Context),
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.init = decode_init,
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.close = decode_end,
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.decode = decode_frame,
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.capabilities = CODEC_CAP_DR1,
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.long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),
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};
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/* Disable the encoder. */
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#undef CONFIG_VCR1_ENCODER
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#define CONFIG_VCR1_ENCODER 0
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#if CONFIG_VCR1_ENCODER
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static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
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int buf_size, void *data)
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{
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VCR1Context *const a = avctx->priv_data;
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AVFrame *pict = data;
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AVFrame *const p = &a->picture;
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int size;
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*p = *pict;
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p->pict_type = AV_PICTURE_TYPE_I;
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p->key_frame = 1;
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avpriv_align_put_bits(&a->pb);
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while (get_bit_count(&a->pb) & 31)
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put_bits(&a->pb, 8, 0);
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size = get_bit_count(&a->pb) / 32;
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return size * 4;
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}
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AVCodec ff_vcr1_encoder = {
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.name = "vcr1",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = CODEC_ID_VCR1,
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.priv_data_size = sizeof(VCR1Context),
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.init = common_init,
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.encode = encode_frame,
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.long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),
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};
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#endif /* CONFIG_VCR1_ENCODER */
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