libavformat/rawvideodec.c

   1 /*
   2  * RAW video demuxer
   3  * Copyright (c) 2001 Fabrice Bellard
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "config_components.h"
  23
  24 #include "libavutil/imgutils.h"
  25 #include "libavutil/parseutils.h"
  26 #include "libavutil/pixdesc.h"
  27 #include "libavutil/opt.h"
  28 #include "demux.h"
  29 #include "internal.h"
  30 #include "avformat.h"
  31
  32 typedef struct RawVideoDemuxerContext {
  33     const AVClass *class;     /**< Class for private options. */
  34     int width, height;        /**< Integers describing video size, set by a private option. */
  35     char *pixel_format;       /**< Set by a private option. */
  36     AVRational framerate;     /**< AVRational describing framerate, set by a private option. */
  37 } RawVideoDemuxerContext;
  38
  39 // v210 frame width is padded to multiples of 48
  40 #define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3)
  41
  42 static int rawvideo_read_header(AVFormatContext *ctx)
  43 {
  44     RawVideoDemuxerContext *s = ctx->priv_data;
  45     enum AVPixelFormat pix_fmt;
  46     AVStream *st;
  47     int packet_size;
  48     int ret;
  49
  50     st = avformat_new_stream(ctx, NULL);
  51     if (!st)
  52         return AVERROR(ENOMEM);
  53
  54     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
  55
  56     st->codecpar->codec_id = ffifmt(ctx->iformat)->raw_codec_id;
  57
  58     if ((ffifmt(ctx->iformat)->raw_codec_id != AV_CODEC_ID_V210) &&
  59         (ffifmt(ctx->iformat)->raw_codec_id != AV_CODEC_ID_V210X)) {
  60         if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
  61             av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
  62                     s->pixel_format);
  63             return AVERROR(EINVAL);
  64         }
  65     }
  66
  67     avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
  68
  69     ret = av_image_check_size(s->width, s->height, 0, ctx);
  70     if (ret < 0)
  71         return ret;
  72
  73     st->codecpar->width  = s->width;
  74     st->codecpar->height = s->height;
  75
  76     if (ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_BITPACKED) {
  77         unsigned int pgroup; /* size of the pixel group in bytes */
  78         unsigned int xinc;
  79         const AVPixFmtDescriptor *desc;
  80         int tag;
  81
  82         desc = av_pix_fmt_desc_get(pix_fmt);
  83         st->codecpar->bits_per_coded_sample = av_get_bits_per_pixel(desc);
  84         if (pix_fmt == AV_PIX_FMT_YUV422P10) {
  85             tag = MKTAG('U', 'Y', 'V', 'Y');
  86             pgroup = 5;
  87             xinc   = 2;
  88         } else if (pix_fmt == AV_PIX_FMT_UYVY422) {
  89             tag = MKTAG('U', 'Y', 'V', 'Y');
  90             pgroup = 4;
  91             xinc   = 2;
  92             st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
  93         } else {
  94             av_log(ctx, AV_LOG_ERROR, "unsupported format: %s for bitpacked.\n",
  95                     s->pixel_format);
  96             return AVERROR(EINVAL);
  97         }
  98         st->codecpar->codec_tag = tag;
  99         packet_size  = s->width * s->height * pgroup / xinc;
 100     } else if ((ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210) ||
 101                (ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210X)) {
 102         pix_fmt = ffifmt(ctx->iformat)->raw_codec_id == AV_CODEC_ID_V210 ?
 103                   AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV422P16;
 104
 105         packet_size = GET_PACKET_SIZE(s->width, s->height);
 106     } else {
 107         packet_size = av_image_get_buffer_size(pix_fmt, s->width, s->height, 1);
 108         if (packet_size < 0)
 109             return packet_size;
 110     }
 111     if (packet_size == 0)
 112         return AVERROR(EINVAL);
 113
 114     st->codecpar->format = pix_fmt;
 115     ctx->packet_size = packet_size;
 116     st->codecpar->bit_rate = av_rescale_q(ctx->packet_size,
 117                                        (AVRational){8,1}, st->time_base);
 118
 119     return 0;
 120 }
 121
 122
 123 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
 124 {
 125     int ret;
 126
 127     ret = av_get_packet(s->pb, pkt, s->packet_size);
 128     pkt->pts = pkt->dts = pkt->pos / s->packet_size;
 129
 130     pkt->stream_index = 0;
 131     if (ret < 0)
 132         return ret;
 133     return 0;
 134 }
 135
 136 #define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
 137 #define DEC AV_OPT_FLAG_DECODING_PARAM
 138 static const AVOption rawvideo_options[] = {
 139     /* pixel_format is not used by the v210 demuxers. */
 140     { "pixel_format", "set pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
 141     { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
 142     { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
 143     { NULL },
 144 };
 145
 146 static const AVClass rawvideo_demuxer_class = {
 147     .class_name = "rawvideo demuxer",
 148     .item_name  = av_default_item_name,
 149     .option     = rawvideo_options,
 150     .version    = LIBAVUTIL_VERSION_INT,
 151 };
 152
 153 const FFInputFormat ff_rawvideo_demuxer = {
 154     .p.name         = "rawvideo",
 155     .p.long_name    = NULL_IF_CONFIG_SMALL("raw video"),
 156     .p.flags        = AVFMT_GENERIC_INDEX,
 157     .p.extensions   = "yuv,cif,qcif,rgb",
 158     .p.priv_class   = &rawvideo_demuxer_class,
 159     .priv_data_size = sizeof(RawVideoDemuxerContext),
 160     .read_header    = rawvideo_read_header,
 161     .read_packet    = rawvideo_read_packet,
 162     .raw_codec_id   = AV_CODEC_ID_RAWVIDEO,
 163 };
 164
 165 static const AVClass bitpacked_demuxer_class = {
 166     .class_name = "bitpacked demuxer",
 167     .item_name  = av_default_item_name,
 168     .option     = rawvideo_options,
 169     .version    = LIBAVUTIL_VERSION_INT,
 170 };
 171
 172 #if CONFIG_BITPACKED_DEMUXER
 173 const FFInputFormat ff_bitpacked_demuxer = {
 174     .p.name         = "bitpacked",
 175     .p.long_name    = NULL_IF_CONFIG_SMALL("Bitpacked"),
 176     .p.flags        = AVFMT_GENERIC_INDEX,
 177     .p.extensions   = "bitpacked",
 178     .p.priv_class   = &bitpacked_demuxer_class,
 179     .priv_data_size = sizeof(RawVideoDemuxerContext),
 180     .read_header    = rawvideo_read_header,
 181     .read_packet    = rawvideo_read_packet,
 182     .raw_codec_id   = AV_CODEC_ID_BITPACKED,
 183 };
 184 #endif // CONFIG_BITPACKED_DEMUXER
 185
 186 static const AVClass v210_demuxer_class = {
 187     .class_name = "v210(x) demuxer",
 188     .item_name  = av_default_item_name,
 189     .option     = rawvideo_options + 1,
 190     .version    = LIBAVUTIL_VERSION_INT,
 191 };
 192
 193 #if CONFIG_V210_DEMUXER
 194 const FFInputFormat ff_v210_demuxer = {
 195     .p.name         = "v210",
 196     .p.long_name    = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
 197     .p.flags        = AVFMT_GENERIC_INDEX,
 198     .p.extensions   = "v210",
 199     .p.priv_class   = &v210_demuxer_class,
 200     .priv_data_size = sizeof(RawVideoDemuxerContext),
 201     .read_header    = rawvideo_read_header,
 202     .read_packet    = rawvideo_read_packet,
 203     .raw_codec_id   = AV_CODEC_ID_V210,
 204 };
 205 #endif // CONFIG_V210_DEMUXER
 206
 207 #if CONFIG_V210X_DEMUXER
 208 const FFInputFormat ff_v210x_demuxer = {
 209     .p.name         = "v210x",
 210     .p.long_name    = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
 211     .p.flags        = AVFMT_GENERIC_INDEX,
 212     .p.extensions   = "yuv10",
 213     .p.priv_class   = &v210_demuxer_class,
 214     .priv_data_size = sizeof(RawVideoDemuxerContext),
 215     .read_header    = rawvideo_read_header,
 216     .read_packet    = rawvideo_read_packet,
 217     .raw_codec_id   = AV_CODEC_ID_V210X,
 218 };
 219 #endif // CONFIG_V210X_DEMUXER