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260f5a47a5
Some tools like v4l2-ctl dump data without skip padding. If the padding size is not an integer multiple of the number of pixel bytes, we cannot handle it by using a larger width, e.g.,, for RGB24 image with 32 bytes padding in each line.
297 lines
10 KiB
C
297 lines
10 KiB
C
/*
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* RAW video demuxer
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* Copyright (c) 2001 Fabrice Bellard
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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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#include "config_components.h"
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#include <stdbool.h>
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#include "libavutil/imgutils.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/opt.h"
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#include "demux.h"
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#include "internal.h"
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#include "avformat.h"
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typedef struct RawVideoDemuxerContext {
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const AVClass *class; /**< Class for private options. */
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int width, height; /**< Integers describing video size, set by a private option. */
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enum AVPixelFormat pix_fmt;
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AVRational framerate; /**< AVRational describing framerate, set by a private option. */
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bool has_padding;
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/* We could derive linesize[1 to N] from linesize[0] for multiplane formats,
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* but having users explicitly specify linesize for each plane can reduce
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* unexpected results and support more use cases.
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*/
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int *linesize;
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unsigned nb_linesize;
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// with padding
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size_t frame_size;
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// linesize without padding
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int raw_bytes[4];
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} RawVideoDemuxerContext;
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// v210 frame width is padded to multiples of 48
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#define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3)
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static int rawvideo_read_header(AVFormatContext *ctx)
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{
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RawVideoDemuxerContext *s = ctx->priv_data;
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enum AVPixelFormat pix_fmt = s->pix_fmt;
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AVStream *st;
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int packet_size;
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int ret;
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st = avformat_new_stream(ctx, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = ffifmt(ctx->iformat)->raw_codec_id;
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avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
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ret = av_image_check_size(s->width, s->height, 0, ctx);
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if (ret < 0)
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return ret;
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st->codecpar->width = s->width;
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st->codecpar->height = s->height;
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if (s->nb_linesize) {
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int n = av_pix_fmt_count_planes(pix_fmt);
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if (s->nb_linesize != n) {
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av_log(ctx, AV_LOG_ERROR, "Invalid number of stride %u, "
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"pixel format has %d plane\n",
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s->nb_linesize, n);
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return AVERROR(EINVAL);
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}
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ret = av_image_fill_linesizes(s->raw_bytes, pix_fmt, s->width);
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if (ret < 0)
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return ret;
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size_t linesize[4] = {0};
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for (int i = 0; i < n; i++) {
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if (s->linesize[i] < s->raw_bytes[i]) {
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av_log(ctx, AV_LOG_ERROR, "Invalid stride %u of plane %d, "
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"minimum required size is %d for width %d\n",
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s->linesize[i], i, s->raw_bytes[i], s->width);
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return AVERROR(EINVAL);
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}
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if (s->linesize[i] > s->raw_bytes[i])
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s->has_padding = true;
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linesize[i] = s->linesize[i];
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}
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size_t plane_size[4] = {0};
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av_image_fill_plane_sizes(plane_size, pix_fmt, s->height, linesize);
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s->frame_size = plane_size[0] + plane_size[1] + plane_size[2] + plane_size[3];
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}
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if (ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_BITPACKED) {
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unsigned int pgroup; /* size of the pixel group in bytes */
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unsigned int xinc;
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const AVPixFmtDescriptor *desc;
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int tag;
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desc = av_pix_fmt_desc_get(pix_fmt);
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st->codecpar->bits_per_coded_sample = av_get_bits_per_pixel(desc);
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if (pix_fmt == AV_PIX_FMT_YUV422P10) {
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tag = MKTAG('U', 'Y', 'V', 'Y');
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pgroup = 5;
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xinc = 2;
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} else if (pix_fmt == AV_PIX_FMT_UYVY422) {
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tag = MKTAG('U', 'Y', 'V', 'Y');
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pgroup = 4;
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xinc = 2;
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st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
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} else {
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av_log(ctx, AV_LOG_ERROR, "unsupported format: %s for bitpacked.\n",
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desc->name);
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return AVERROR(EINVAL);
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}
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st->codecpar->codec_tag = tag;
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packet_size = s->width * s->height * pgroup / xinc;
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} else if ((ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210) ||
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(ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210X)) {
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pix_fmt = ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210 ?
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AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV422P16;
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packet_size = GET_PACKET_SIZE(s->width, s->height);
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} else {
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packet_size = av_image_get_buffer_size(pix_fmt, s->width, s->height, 1);
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if (packet_size < 0)
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return packet_size;
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}
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if (packet_size == 0)
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return AVERROR(EINVAL);
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st->codecpar->format = pix_fmt;
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ctx->packet_size = packet_size;
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st->codecpar->bit_rate = av_rescale_q(ctx->packet_size,
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(AVRational){8,1}, st->time_base);
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return 0;
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}
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static int rawvideo_read_packet(AVFormatContext *ctx, AVPacket *pkt)
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{
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int ret;
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RawVideoDemuxerContext *s = ctx->priv_data;
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if (!s->has_padding) {
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ret = av_get_packet(ctx->pb, pkt, ctx->packet_size);
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if (ret < 0)
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return ret;
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pkt->pts = pkt->dts = pkt->pos / ctx->packet_size;
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return 0;
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}
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ret = av_new_packet(pkt, ctx->packet_size);
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if (ret < 0)
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return ret;
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pkt->pos = avio_tell(ctx->pb);
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pkt->pts = pkt->dts = pkt->pos / s->frame_size;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
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uint8_t *p = pkt->data;
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for (int i = 0; i < s->nb_linesize; i++) {
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int shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
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int h = AV_CEIL_RSHIFT(s->height, shift);
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int skip_bytes = s->linesize[i] - s->raw_bytes[i];
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for (int j = 0; j < h; j++) {
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ret = avio_read(ctx->pb, p, s->raw_bytes[i]);
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if (ret != s->raw_bytes[i]) {
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if (ret < 0 && ret != AVERROR_EOF)
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return ret;
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if (ret == AVERROR_EOF && p == pkt->data)
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return AVERROR_EOF;
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memset(p, 0, pkt->size - (p - pkt->data));
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pkt->flags |= AV_PKT_FLAG_CORRUPT;
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return 0;
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}
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p += s->raw_bytes[i];
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avio_skip(ctx->pb, skip_bytes);
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}
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}
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return 0;
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}
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#define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
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#define DEC AV_OPT_FLAG_DECODING_PARAM
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static const AVOption rawvideo_options[] = {
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// Only supported by rawvideo demuxer
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{"stride", "frame line size in bytes", OFFSET(linesize), AV_OPT_TYPE_INT | AV_OPT_TYPE_FLAG_ARRAY, {.arr = NULL}, 0, INT_MAX, DEC },
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#define BITPACKED_OPTION_OFFSET 1 // skip stride option
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/* pixel_format is not used by the v210 demuxers. */
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{ "pixel_format", "set pixel format", OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_YUV420P}, AV_PIX_FMT_YUV420P, INT_MAX, DEC },
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#define V210_OPTION_OFFSET 2 // skip stride and pixel_format option
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{ "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
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{ "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
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{ NULL },
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};
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static const AVClass rawvideo_demuxer_class = {
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.class_name = "rawvideo demuxer",
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.item_name = av_default_item_name,
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.option = rawvideo_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const FFInputFormat ff_rawvideo_demuxer = {
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.p.name = "rawvideo",
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.p.long_name = NULL_IF_CONFIG_SMALL("raw video"),
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.p.flags = AVFMT_GENERIC_INDEX,
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.p.extensions = "yuv,cif,qcif,rgb",
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.p.priv_class = &rawvideo_demuxer_class,
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.priv_data_size = sizeof(RawVideoDemuxerContext),
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.read_header = rawvideo_read_header,
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.read_packet = rawvideo_read_packet,
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.raw_codec_id = AV_CODEC_ID_RAWVIDEO,
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};
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static const AVClass bitpacked_demuxer_class = {
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.class_name = "bitpacked demuxer",
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.item_name = av_default_item_name,
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.option = &rawvideo_options[BITPACKED_OPTION_OFFSET],
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.version = LIBAVUTIL_VERSION_INT,
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};
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#if CONFIG_BITPACKED_DEMUXER
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const FFInputFormat ff_bitpacked_demuxer = {
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.p.name = "bitpacked",
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.p.long_name = NULL_IF_CONFIG_SMALL("Bitpacked"),
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.p.flags = AVFMT_GENERIC_INDEX,
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.p.extensions = "bitpacked",
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.p.priv_class = &bitpacked_demuxer_class,
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.priv_data_size = sizeof(RawVideoDemuxerContext),
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.read_header = rawvideo_read_header,
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.read_packet = rawvideo_read_packet,
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.raw_codec_id = AV_CODEC_ID_BITPACKED,
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};
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#endif // CONFIG_BITPACKED_DEMUXER
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static const AVClass v210_demuxer_class = {
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.class_name = "v210(x) demuxer",
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.item_name = av_default_item_name,
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.option = &rawvideo_options[V210_OPTION_OFFSET],
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.version = LIBAVUTIL_VERSION_INT,
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};
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#if CONFIG_V210_DEMUXER
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const FFInputFormat ff_v210_demuxer = {
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.p.name = "v210",
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.p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
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.p.flags = AVFMT_GENERIC_INDEX,
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.p.extensions = "v210",
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.p.priv_class = &v210_demuxer_class,
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.priv_data_size = sizeof(RawVideoDemuxerContext),
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.read_header = rawvideo_read_header,
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.read_packet = rawvideo_read_packet,
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.raw_codec_id = AV_CODEC_ID_V210,
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};
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#endif // CONFIG_V210_DEMUXER
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#if CONFIG_V210X_DEMUXER
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const FFInputFormat ff_v210x_demuxer = {
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.p.name = "v210x",
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.p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
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.p.flags = AVFMT_GENERIC_INDEX,
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.p.extensions = "yuv10",
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.p.priv_class = &v210_demuxer_class,
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.priv_data_size = sizeof(RawVideoDemuxerContext),
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.read_header = rawvideo_read_header,
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.read_packet = rawvideo_read_packet,
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.raw_codec_id = AV_CODEC_ID_V210X,
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};
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#endif // CONFIG_V210X_DEMUXER
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