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mpv/demux/demux_raw.c

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include "options/m_option.h"
#include "options/options.h"
#include "stream/stream.h"
#include "demux.h"
#include "stheader.h"
#include "codec_tags.h"
#include "video/img_format.h"
#include "video/img_fourcc.h"
#include "osdep/endian.h"
struct demux_rawaudio_opts {
struct m_channels channels;
int samplerate;
int aformat;
};
// Ad-hoc schema to systematically encode the format as int
#define PCM(sign, is_float, bits, is_be) \
((sign) | ((is_float) << 1) | ((is_be) << 2) | ((bits) << 3))
#define NE (BYTE_ORDER == BIG_ENDIAN)
#define OPT_BASE_STRUCT struct demux_rawaudio_opts
const struct m_sub_options demux_rawaudio_conf = {
.opts = (const m_option_t[]) {
OPT_CHANNELS("channels", channels, 0, .min = 1),
OPT_INTRANGE("rate", samplerate, 0, 1000, 8 * 48000),
OPT_CHOICE("format", aformat, 0,
({"u8", PCM(0, 0, 8, 0)},
{"s8", PCM(1, 0, 8, 0)},
{"u16le", PCM(0, 0, 16, 0)}, {"u16be", PCM(0, 0, 16, 1)},
{"s16le", PCM(1, 0, 16, 0)}, {"s16be", PCM(1, 0, 16, 1)},
{"u24le", PCM(0, 0, 24, 0)}, {"u24be", PCM(0, 0, 24, 1)},
{"s24le", PCM(1, 0, 24, 0)}, {"s24be", PCM(1, 0, 24, 1)},
{"u32le", PCM(0, 0, 32, 0)}, {"u32be", PCM(0, 0, 32, 1)},
{"s32le", PCM(1, 0, 32, 0)}, {"s32be", PCM(1, 0, 32, 1)},
{"floatle", PCM(0, 1, 32, 0)}, {"floatbe", PCM(0, 1, 32, 1)},
{"doublele",PCM(0, 1, 64, 0)}, {"doublebe", PCM(0, 1, 64, 1)},
{"u16", PCM(0, 0, 16, NE)},
{"s16", PCM(1, 0, 16, NE)},
{"u24", PCM(0, 0, 24, NE)},
{"s24", PCM(1, 0, 24, NE)},
{"u32", PCM(0, 0, 32, NE)},
{"s32", PCM(1, 0, 32, NE)},
{"float", PCM(0, 1, 32, NE)},
{"double", PCM(0, 1, 64, NE)})),
{0}
},
.size = sizeof(struct demux_rawaudio_opts),
.defaults = &(const struct demux_rawaudio_opts){
// Note that currently, stream_cdda expects exactly these parameters!
.channels = {
.set = 1,
.chmaps = (struct mp_chmap[]){ MP_CHMAP_INIT_STEREO, },
.num_chmaps = 1,
},
.samplerate = 44100,
.aformat = PCM(1, 0, 16, 0), // s16le
},
};
#undef PCM
#undef NE
struct demux_rawvideo_opts {
int vformat;
int mp_format;
char *codec;
int width;
int height;
float fps;
int imgsize;
};
#undef OPT_BASE_STRUCT
#define OPT_BASE_STRUCT struct demux_rawvideo_opts
const struct m_sub_options demux_rawvideo_conf = {
.opts = (const m_option_t[]) {
OPT_INTRANGE("w", width, 0, 1, 8192),
OPT_INTRANGE("h", height, 0, 1, 8192),
OPT_GENERAL(int, "format", vformat, 0, .type = &m_option_type_fourcc),
OPT_IMAGEFORMAT("mp-format", mp_format, 0),
OPT_STRING("codec", codec, 0),
OPT_FLOATRANGE("fps", fps, 0, 0.001, 1000),
OPT_INTRANGE("size", imgsize, 0, 1, 8192 * 8192 * 4),
{0}
},
.size = sizeof(struct demux_rawvideo_opts),
.defaults = &(const struct demux_rawvideo_opts){
.vformat = MP_FOURCC_I420,
.width = 1280,
.height = 720,
.fps = 25,
},
};
struct priv {
struct sh_stream *sh;
int frame_size;
int read_frames;
double frame_rate;
};
static int demux_rawaudio_open(demuxer_t *demuxer, enum demux_check check)
{
struct demux_rawaudio_opts *opts = demuxer->opts->demux_rawaudio;
if (check != DEMUX_CHECK_REQUEST && check != DEMUX_CHECK_FORCE)
return -1;
if (opts->channels.num_chmaps != 1) {
MP_ERR(demuxer, "Invalid channels option given.\n");
return -1;
}
struct sh_stream *sh = demux_alloc_sh_stream(STREAM_AUDIO);
struct mp_codec_params *c = sh->codec;
c->channels = opts->channels.chmaps[0];
c->force_channels = true;
c->samplerate = opts->samplerate;
int f = opts->aformat;
// See PCM(): sign float bits endian
mp_set_pcm_codec(sh->codec, f & 1, f & 2, f >> 3, f & 4);
int samplesize = ((f >> 3) + 7) / 8;
demux_add_sh_stream(demuxer, sh);
struct priv *p = talloc_ptrtype(demuxer, p);
demuxer->priv = p;
*p = (struct priv) {
.sh = sh,
.frame_size = samplesize * c->channels.num,
.frame_rate = c->samplerate,
.read_frames = c->samplerate / 8,
};
return 0;
}
static int demux_rawvideo_open(demuxer_t *demuxer, enum demux_check check)
{
struct demux_rawvideo_opts *opts = demuxer->opts->demux_rawvideo;
if (check != DEMUX_CHECK_REQUEST && check != DEMUX_CHECK_FORCE)
return -1;
int width = opts->width;
int height = opts->height;
if (!width || !height) {
MP_ERR(demuxer, "rawvideo: width or height not specified!\n");
return -1;
}
const char *decoder = "rawvideo";
int imgfmt = opts->vformat;
int imgsize = opts->imgsize;
if (opts->mp_format && !IMGFMT_IS_HWACCEL(opts->mp_format)) {
decoder = "mp-rawvideo";
imgfmt = opts->mp_format;
if (!imgsize) {
struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(opts->mp_format);
for (int p = 0; p < desc.num_planes; p++) {
imgsize += ((width >> desc.xs[p]) * (height >> desc.ys[p]) *
desc.bpp[p] + 7) / 8;
}
}
} else if (opts->codec && opts->codec[0])
decoder = talloc_strdup(demuxer, opts->codec);
if (!imgsize) {
int bpp = 0;
switch (imgfmt) {
case MP_FOURCC_I420: case MP_FOURCC_IYUV:
case MP_FOURCC_NV12: case MP_FOURCC_NV21:
case MP_FOURCC_HM12:
case MP_FOURCC_YV12:
bpp = 12;
break;
case MP_FOURCC_RGB12: case MP_FOURCC_BGR12:
case MP_FOURCC_RGB15: case MP_FOURCC_BGR15:
case MP_FOURCC_RGB16: case MP_FOURCC_BGR16:
case MP_FOURCC_YUY2: case MP_FOURCC_UYVY:
bpp = 16;
break;
case MP_FOURCC_RGB8: case MP_FOURCC_BGR8:
case MP_FOURCC_Y800: case MP_FOURCC_Y8:
bpp = 8;
break;
case MP_FOURCC_RGB24: case MP_FOURCC_BGR24:
bpp = 24;
break;
case MP_FOURCC_RGB32: case MP_FOURCC_BGR32:
bpp = 32;
break;
}
if (!bpp) {
MP_ERR(demuxer, "rawvideo: img size not specified and unknown format!\n");
return -1;
}
imgsize = width * height * bpp / 8;
}
struct sh_stream *sh = demux_alloc_sh_stream(STREAM_VIDEO);
struct mp_codec_params *c = sh->codec;
c->codec = decoder;
c->codec_tag = imgfmt;
c->fps = opts->fps;
c->disp_w = width;
c->disp_h = height;
demux_add_sh_stream(demuxer, sh);
struct priv *p = talloc_ptrtype(demuxer, p);
demuxer->priv = p;
*p = (struct priv) {
.sh = sh,
.frame_size = imgsize,
.frame_rate = c->fps,
.read_frames = 1,
};
return 0;
}
static int raw_fill_buffer(demuxer_t *demuxer)
{
struct priv *p = demuxer->priv;
if (demuxer->stream->eof)
return 0;
struct demux_packet *dp = new_demux_packet(p->frame_size * p->read_frames);
if (!dp) {
MP_ERR(demuxer, "Can't read packet.\n");
return 1;
}
dp->pos = stream_tell(demuxer->stream);
dp->pts = (dp->pos / p->frame_size) / p->frame_rate;
int len = stream_read(demuxer->stream, dp->buffer, dp->len);
demux_packet_shorten(dp, len);
demux_add_packet(p->sh, dp);
return 1;
}
static void raw_seek(demuxer_t *demuxer, double seek_pts, int flags)
{
struct priv *p = demuxer->priv;
stream_t *s = demuxer->stream;
int64_t end = 0;
stream_control(s, STREAM_CTRL_GET_SIZE, &end);
int64_t pos = seek_pts * p->frame_rate * p->frame_size;
if (flags & SEEK_FACTOR)
pos = end * seek_pts;
if (pos < 0)
pos = 0;
if (end && pos > end)
pos = end;
stream_seek(s, (pos / p->frame_size) * p->frame_size);
}
static int raw_control(demuxer_t *demuxer, int cmd, void *arg)
{
struct priv *p = demuxer->priv;
switch (cmd) {
case DEMUXER_CTRL_GET_TIME_LENGTH: {
stream_t *s = demuxer->stream;
int64_t end = 0;
if (stream_control(s, STREAM_CTRL_GET_SIZE, &end) != STREAM_OK)
return DEMUXER_CTRL_DONTKNOW;
*((double *) arg) = (end / p->frame_size) / p->frame_rate;
return DEMUXER_CTRL_OK;
}
default:
return DEMUXER_CTRL_NOTIMPL;
}
}
const demuxer_desc_t demuxer_desc_rawaudio = {
.name = "rawaudio",
.desc = "Uncompressed audio",
.open = demux_rawaudio_open,
.fill_buffer = raw_fill_buffer,
.seek = raw_seek,
.control = raw_control,
};
const demuxer_desc_t demuxer_desc_rawvideo = {
.name = "rawvideo",
.desc = "Uncompressed video",
.open = demux_rawvideo_open,
.fill_buffer = raw_fill_buffer,
.seek = raw_seek,
.control = raw_control,
};
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