libavformat/rawvideodec.c - chromium/third_party/ffmpeg - Git at Google

 /*
  * RAW video demuxer
  * Copyright (c) 2001 Fabrice Bellard
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg 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,
  * 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
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */

 #include "config_components.h"

 #include "libavutil/imgutils.h"
 #include "libavutil/parseutils.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/opt.h"
 #include "demux.h"
 #include "internal.h"
 #include "avformat.h"

 typedef struct RawVideoDemuxerContext {
     const AVClass *class;     /**< Class for private options. */
     int width, height;        /**< Integers describing video size, set by a private option. */
     char *pixel_format;       /**< Set by a private option. */
     AVRational framerate;     /**< AVRational describing framerate, set by a private option. */
 } RawVideoDemuxerContext;

 // v210 frame width is padded to multiples of 48
 #define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3)

 static int rawvideo_read_header(AVFormatContext *ctx)
 {
     RawVideoDemuxerContext *s = ctx->priv_data;
     enum AVPixelFormat pix_fmt;
     AVStream *st;
     int packet_size;
     int ret;

     st = avformat_new_stream(ctx, NULL);
     if (!st)
         return AVERROR(ENOMEM);

     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;

     st->codecpar->codec_id = ffifmt(ctx->iformat)->raw_codec_id;

     if ((ffifmt(ctx->iformat)->raw_codec_id != AV_CODEC_ID_V210) &&
         (ffifmt(ctx->iformat)->raw_codec_id != AV_CODEC_ID_V210X)) {
         if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
             av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
                     s->pixel_format);
             return AVERROR(EINVAL);
         }
     }

     avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);

     ret = av_image_check_size(s->width, s->height, 0, ctx);
     if (ret < 0)
         return ret;

     st->codecpar->width  = s->width;
     st->codecpar->height = s->height;

     if (ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_BITPACKED) {
         unsigned int pgroup; /* size of the pixel group in bytes */
         unsigned int xinc;
         const AVPixFmtDescriptor *desc;
         int tag;

         desc = av_pix_fmt_desc_get(pix_fmt);
         st->codecpar->bits_per_coded_sample = av_get_bits_per_pixel(desc);
         if (pix_fmt == AV_PIX_FMT_YUV422P10) {
             tag = MKTAG('U', 'Y', 'V', 'Y');
             pgroup = 5;
             xinc   = 2;
         } else if (pix_fmt == AV_PIX_FMT_UYVY422) {
             tag = MKTAG('U', 'Y', 'V', 'Y');
             pgroup = 4;
             xinc   = 2;
             st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
         } else {
             av_log(ctx, AV_LOG_ERROR, "unsupported format: %s for bitpacked.\n",
                     s->pixel_format);
             return AVERROR(EINVAL);
         }
         st->codecpar->codec_tag = tag;
         packet_size  = s->width * s->height * pgroup / xinc;
     } else if ((ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210) ||
                (ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210X)) {
         pix_fmt = ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210 ?
                   AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV422P16;

         packet_size = GET_PACKET_SIZE(s->width, s->height);
     } else {
         packet_size = av_image_get_buffer_size(pix_fmt, s->width, s->height, 1);
         if (packet_size < 0)
             return packet_size;
     }
     if (packet_size == 0)
         return AVERROR(EINVAL);

     st->codecpar->format = pix_fmt;
     ctx->packet_size = packet_size;
     st->codecpar->bit_rate = av_rescale_q(ctx->packet_size,
                                        (AVRational){8,1}, st->time_base);

     return 0;
 }


 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
     int ret;

     ret = av_get_packet(s->pb, pkt, s->packet_size);
     pkt->pts = pkt->dts = pkt->pos / s->packet_size;

     pkt->stream_index = 0;
     if (ret < 0)
         return ret;
     return 0;
 }

 #define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
 #define DEC AV_OPT_FLAG_DECODING_PARAM
 static const AVOption rawvideo_options[] = {
     /* pixel_format is not used by the v210 demuxers. */
     { "pixel_format", "set pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
     { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
     { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
     { NULL },
 };

 static const AVClass rawvideo_demuxer_class = {
     .class_name = "rawvideo demuxer",
     .item_name  = av_default_item_name,
     .option     = rawvideo_options,
     .version    = LIBAVUTIL_VERSION_INT,
 };

 const FFInputFormat ff_rawvideo_demuxer = {
     .p.name         = "rawvideo",
     .p.long_name    = NULL_IF_CONFIG_SMALL("raw video"),
     .p.flags        = AVFMT_GENERIC_INDEX,
     .p.extensions   = "yuv,cif,qcif,rgb",
     .p.priv_class   = &rawvideo_demuxer_class,
     .priv_data_size = sizeof(RawVideoDemuxerContext),
     .read_header    = rawvideo_read_header,
     .read_packet    = rawvideo_read_packet,
     .raw_codec_id   = AV_CODEC_ID_RAWVIDEO,
 };

 static const AVClass bitpacked_demuxer_class = {
     .class_name = "bitpacked demuxer",
     .item_name  = av_default_item_name,
     .option     = rawvideo_options,
     .version    = LIBAVUTIL_VERSION_INT,
 };

 #if CONFIG_BITPACKED_DEMUXER
 const FFInputFormat ff_bitpacked_demuxer = {
     .p.name         = "bitpacked",
     .p.long_name    = NULL_IF_CONFIG_SMALL("Bitpacked"),
     .p.flags        = AVFMT_GENERIC_INDEX,
     .p.extensions   = "bitpacked",
     .p.priv_class   = &bitpacked_demuxer_class,
     .priv_data_size = sizeof(RawVideoDemuxerContext),
     .read_header    = rawvideo_read_header,
     .read_packet    = rawvideo_read_packet,
     .raw_codec_id   = AV_CODEC_ID_BITPACKED,
 };
 #endif // CONFIG_BITPACKED_DEMUXER

 static const AVClass v210_demuxer_class = {
     .class_name = "v210(x) demuxer",
     .item_name  = av_default_item_name,
     .option     = rawvideo_options + 1,
     .version    = LIBAVUTIL_VERSION_INT,
 };

 #if CONFIG_V210_DEMUXER
 const FFInputFormat ff_v210_demuxer = {
     .p.name         = "v210",
     .p.long_name    = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
     .p.flags        = AVFMT_GENERIC_INDEX,
     .p.extensions   = "v210",
     .p.priv_class   = &v210_demuxer_class,
     .priv_data_size = sizeof(RawVideoDemuxerContext),
     .read_header    = rawvideo_read_header,
     .read_packet    = rawvideo_read_packet,
     .raw_codec_id   = AV_CODEC_ID_V210,
 };
 #endif // CONFIG_V210_DEMUXER

 #if CONFIG_V210X_DEMUXER
 const FFInputFormat ff_v210x_demuxer = {
     .p.name         = "v210x",
     .p.long_name    = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
     .p.flags        = AVFMT_GENERIC_INDEX,
     .p.extensions   = "yuv10",
     .p.priv_class   = &v210_demuxer_class,
     .priv_data_size = sizeof(RawVideoDemuxerContext),
     .read_header    = rawvideo_read_header,
     .read_packet    = rawvideo_read_packet,
     .raw_codec_id   = AV_CODEC_ID_V210X,
 };
 #endif // CONFIG_V210X_DEMUXER
	/*
	* RAW video demuxer
	* Copyright (c) 2001 Fabrice Bellard
	*
	* This file is part of FFmpeg.
	*
	* FFmpeg 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,
	* 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
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#include "config_components.h"

	#include "libavutil/imgutils.h"
	#include "libavutil/parseutils.h"
	#include "libavutil/pixdesc.h"
	#include "libavutil/opt.h"
	#include "demux.h"
	#include "internal.h"
	#include "avformat.h"

	typedef struct RawVideoDemuxerContext {
	const AVClass class; /< Class for private options. /
	int width, height; /*< Integers describing video size, set by a private option. /
	char pixel_format; /< Set by a private option. /
	AVRational framerate; /*< AVRational describing framerate, set by a private option. /
	} RawVideoDemuxerContext;

	// v210 frame width is padded to multiples of 48
	#define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3)

	static int rawvideo_read_header(AVFormatContext *ctx)
	{
	RawVideoDemuxerContext *s = ctx->priv_data;
	enum AVPixelFormat pix_fmt;
	AVStream *st;
	int packet_size;
	int ret;

	st = avformat_new_stream(ctx, NULL);
	if (!st)
	return AVERROR(ENOMEM);

	st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;

	st->codecpar->codec_id = ffifmt(ctx->iformat)->raw_codec_id;

	if ((ffifmt(ctx->iformat)->raw_codec_id != AV_CODEC_ID_V210) &&
	(ffifmt(ctx->iformat)->raw_codec_id != AV_CODEC_ID_V210X)) {
	if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
	av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
	s->pixel_format);
	return AVERROR(EINVAL);
	}
	}

	avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);

	ret = av_image_check_size(s->width, s->height, 0, ctx);
	if (ret < 0)
	return ret;

	st->codecpar->width = s->width;
	st->codecpar->height = s->height;

	if (ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_BITPACKED) {
	unsigned int pgroup; /* size of the pixel group in bytes */
	unsigned int xinc;
	const AVPixFmtDescriptor *desc;
	int tag;

	desc = av_pix_fmt_desc_get(pix_fmt);
	st->codecpar->bits_per_coded_sample = av_get_bits_per_pixel(desc);
	if (pix_fmt == AV_PIX_FMT_YUV422P10) {
	tag = MKTAG('U', 'Y', 'V', 'Y');
	pgroup = 5;
	xinc = 2;
	} else if (pix_fmt == AV_PIX_FMT_UYVY422) {
	tag = MKTAG('U', 'Y', 'V', 'Y');
	pgroup = 4;
	xinc = 2;
	st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
	} else {
	av_log(ctx, AV_LOG_ERROR, "unsupported format: %s for bitpacked.\n",
	s->pixel_format);
	return AVERROR(EINVAL);
	}
	st->codecpar->codec_tag = tag;
	packet_size = s->width * s->height * pgroup / xinc;
	} else if ((ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210) \|\|
	(ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210X)) {
	pix_fmt = ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210 ?
	AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV422P16;

	packet_size = GET_PACKET_SIZE(s->width, s->height);
	} else {
	packet_size = av_image_get_buffer_size(pix_fmt, s->width, s->height, 1);
	if (packet_size < 0)
	return packet_size;
	}
	if (packet_size == 0)
	return AVERROR(EINVAL);

	st->codecpar->format = pix_fmt;
	ctx->packet_size = packet_size;
	st->codecpar->bit_rate = av_rescale_q(ctx->packet_size,
	(AVRational){8,1}, st->time_base);

	return 0;
	}


	static int rawvideo_read_packet(AVFormatContext s, AVPacket pkt)
	{
	int ret;

	ret = av_get_packet(s->pb, pkt, s->packet_size);
	pkt->pts = pkt->dts = pkt->pos / s->packet_size;

	pkt->stream_index = 0;
	if (ret < 0)
	return ret;
	return 0;
	}

	#define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
	#define DEC AV_OPT_FLAG_DECODING_PARAM
	static const AVOption rawvideo_options[] = {
	/* pixel_format is not used by the v210 demuxers. */
	{ "pixel_format", "set pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
	{ "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
	{ "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
	{ NULL },
	};

	static const AVClass rawvideo_demuxer_class = {
	.class_name = "rawvideo demuxer",
	.item_name = av_default_item_name,
	.option = rawvideo_options,
	.version = LIBAVUTIL_VERSION_INT,
	};

	const FFInputFormat ff_rawvideo_demuxer = {
	.p.name = "rawvideo",
	.p.long_name = NULL_IF_CONFIG_SMALL("raw video"),
	.p.flags = AVFMT_GENERIC_INDEX,
	.p.extensions = "yuv,cif,qcif,rgb",
	.p.priv_class = &rawvideo_demuxer_class,
	.priv_data_size = sizeof(RawVideoDemuxerContext),
	.read_header = rawvideo_read_header,
	.read_packet = rawvideo_read_packet,
	.raw_codec_id = AV_CODEC_ID_RAWVIDEO,
	};

	static const AVClass bitpacked_demuxer_class = {
	.class_name = "bitpacked demuxer",
	.item_name = av_default_item_name,
	.option = rawvideo_options,
	.version = LIBAVUTIL_VERSION_INT,
	};

	#if CONFIG_BITPACKED_DEMUXER
	const FFInputFormat ff_bitpacked_demuxer = {
	.p.name = "bitpacked",
	.p.long_name = NULL_IF_CONFIG_SMALL("Bitpacked"),
	.p.flags = AVFMT_GENERIC_INDEX,
	.p.extensions = "bitpacked",
	.p.priv_class = &bitpacked_demuxer_class,
	.priv_data_size = sizeof(RawVideoDemuxerContext),
	.read_header = rawvideo_read_header,
	.read_packet = rawvideo_read_packet,
	.raw_codec_id = AV_CODEC_ID_BITPACKED,
	};
	#endif // CONFIG_BITPACKED_DEMUXER

	static const AVClass v210_demuxer_class = {
	.class_name = "v210(x) demuxer",
	.item_name = av_default_item_name,
	.option = rawvideo_options + 1,
	.version = LIBAVUTIL_VERSION_INT,
	};

	#if CONFIG_V210_DEMUXER
	const FFInputFormat ff_v210_demuxer = {
	.p.name = "v210",
	.p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
	.p.flags = AVFMT_GENERIC_INDEX,
	.p.extensions = "v210",
	.p.priv_class = &v210_demuxer_class,
	.priv_data_size = sizeof(RawVideoDemuxerContext),
	.read_header = rawvideo_read_header,
	.read_packet = rawvideo_read_packet,
	.raw_codec_id = AV_CODEC_ID_V210,
	};
	#endif // CONFIG_V210_DEMUXER

	#if CONFIG_V210X_DEMUXER
	const FFInputFormat ff_v210x_demuxer = {
	.p.name = "v210x",
	.p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
	.p.flags = AVFMT_GENERIC_INDEX,
	.p.extensions = "yuv10",
	.p.priv_class = &v210_demuxer_class,
	.priv_data_size = sizeof(RawVideoDemuxerContext),
	.read_header = rawvideo_read_header,
	.read_packet = rawvideo_read_packet,
	.raw_codec_id = AV_CODEC_ID_V210X,
	};
	#endif // CONFIG_V210X_DEMUXER