avformat: Add v210[x] demuxer

Allows one to do:

    ffmpeg -s 1920x1080          -i blah.v210 ...
    ffmpeg -s 1920x1080 -f v210x -i blah.yuv10 ...

Fixes #1869.
Reviewed-by: James Almer <jamrial@gmail.com>
Reviewed-by: Kieran Kunhya <kierank@obe.tv>

libavformat/Makefile

@@ -447,6 +447,8 @@ OBJS-$(CONFIG_TTA_DEMUXER)               += tta.o apetag.o img2.o
 OBJS-$(CONFIG_TTY_DEMUXER)               += tty.o sauce.o
 OBJS-$(CONFIG_TXD_DEMUXER)               += txd.o
 OBJS-$(CONFIG_UNCODEDFRAMECRC_MUXER)     += uncodedframecrcenc.o framehash.o
+OBJS-$(CONFIG_V210_DEMUXER)              += v210.o
+OBJS-$(CONFIG_V210X_DEMUXER)             += v210.o
 OBJS-$(CONFIG_VAG_DEMUXER)               += vag.o
 OBJS-$(CONFIG_VC1_DEMUXER)               += rawdec.o vc1dec.o
 OBJS-$(CONFIG_VC1_MUXER)                 += rawenc.o

libavformat/allformats.c

@@ -314,6 +314,8 @@ void av_register_all(void)
     REGISTER_DEMUXER (TXD,              txd);
     REGISTER_DEMUXER (TTY,              tty);
     REGISTER_MUXER   (UNCODEDFRAMECRC,  uncodedframecrc);
+    REGISTER_DEMUXER (V210,             v210);
+    REGISTER_DEMUXER (V210X,            v210x);
     REGISTER_DEMUXER (VAG,              vag);
     REGISTER_MUXDEMUX(VC1,              vc1);
     REGISTER_MUXDEMUX(VC1T,             vc1t);

libavformat/v210.c

+/*
+ * Raw v210 video demuxer
+ * Copyright (c) 2015 Tiancheng "Timothy" Gu
+ *
+ * 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 "libavutil/imgutils.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.h"
+#include "internal.h"
+#include "avformat.h"
+
+typedef struct V210DemuxerContext {
+    const AVClass *class;     /**< Class for private options. */
+    int width, height;        /**< Integers describing video size, set by a private option. */
+    AVRational framerate;     /**< AVRational describing framerate, set by a private option. */
+} V210DemuxerContext;
+
+// v210 frame width is padded to multiples of 48
+#define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3)
+
+static int v210_read_header(AVFormatContext *ctx)
+{
+    V210DemuxerContext *s = ctx->priv_data;
+    AVStream *st;
+
+    st = avformat_new_stream(ctx, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+
+    st->codec->codec_id = ctx->iformat->raw_codec_id;
+
+    avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
+
+    st->codec->width    = s->width;
+    st->codec->height   = s->height;
+    st->codec->pix_fmt  = ctx->iformat->raw_codec_id == AV_CODEC_ID_V210 ?
+                          AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV422P16;
+    st->codec->bit_rate = av_rescale_q(GET_PACKET_SIZE(s->width, s->height),
+                                       (AVRational){8,1}, st->time_base);
+
+    return 0;
+}
+
+
+static int v210_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    int packet_size, ret, width, height;
+    AVStream *st = s->streams[0];
+
+    width = st->codec->width;
+    height = st->codec->height;
+
+    packet_size = GET_PACKET_SIZE(width, height);
+    if (packet_size < 0)
+        return -1;
+
+    ret = av_get_packet(s->pb, pkt, packet_size);
+    pkt->pts = pkt->dts = pkt->pos / packet_size;
+
+    pkt->stream_index = 0;
+    if (ret < 0)
+        return ret;
+    return 0;
+}
+
+#define OFFSET(x) offsetof(V210DemuxerContext, x)
+#define DEC AV_OPT_FLAG_DECODING_PARAM
+static const AVOption v210_options[] = {
+    { "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, 0, DEC },
+    { NULL },
+};
+
+#if CONFIG_V210_DEMUXER
+static const AVClass v210_demuxer_class = {
+    .class_name = "v210 demuxer",
+    .item_name  = av_default_item_name,
+    .option     = v210_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_v210_demuxer = {
+    .name           = "v210",
+    .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
+    .priv_data_size = sizeof(V210DemuxerContext),
+    .read_header    = v210_read_header,
+    .read_packet    = v210_read_packet,
+    .flags          = AVFMT_GENERIC_INDEX,
+    .extensions     = "v210",
+    .raw_codec_id   = AV_CODEC_ID_V210,
+    .priv_class     = &v210_demuxer_class,
+};
+#endif // CONFIG_V210_DEMUXER
+
+#if CONFIG_V210X_DEMUXER
+static const AVClass v210x_demuxer_class = {
+    .class_name = "v210x demuxer",
+    .item_name  = av_default_item_name,
+    .option     = v210_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_v210x_demuxer = {
+    .name           = "v210x",
+    .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
+    .priv_data_size = sizeof(V210DemuxerContext),
+    .read_header    = v210_read_header,
+    .read_packet    = v210_read_packet,
+    .flags          = AVFMT_GENERIC_INDEX,
+    .extensions     = "yuv10",
+    .raw_codec_id   = AV_CODEC_ID_V210X,
+    .priv_class     = &v210x_demuxer_class,
+};
+#endif // CONFIG_V210X_DEMUXER