mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
synced 2025-10-26 18:30:52 +08:00
fed0282508
Do this by allocating AVFormatContext together with the data that is currently in AVFormatInternal; or rather: Put AVFormatContext at the beginning of a new structure called FFFormatContext (which encompasses more than just the internal fields and is a proper context in its own right, hence the name) and remove AVFormatInternal altogether. The biggest simplifications occured in avformat_alloc_context(), where one can now simply call avformat_free_context() in case of errors. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
335 lines
13 KiB
C
335 lines
13 KiB
C
/*
|
|
* YUV4MPEG demuxer
|
|
* Copyright (c) 2001, 2002, 2003 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 "libavutil/avstring.h"
|
|
#include "libavutil/imgutils.h"
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "yuv4mpeg.h"
|
|
|
|
/* Header size increased to allow room for optional flags */
|
|
#define MAX_YUV4_HEADER 96
|
|
#define MAX_FRAME_HEADER 80
|
|
|
|
static int yuv4_read_header(AVFormatContext *s)
|
|
{
|
|
char header[MAX_YUV4_HEADER + 10]; // Include headroom for
|
|
// the longest option
|
|
char *tokstart, *tokend, *header_end;
|
|
int i;
|
|
AVIOContext *pb = s->pb;
|
|
int width = -1, height = -1, raten = 0,
|
|
rated = 0, aspectn = 0, aspectd = 0;
|
|
enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE, alt_pix_fmt = AV_PIX_FMT_NONE;
|
|
enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED;
|
|
enum AVFieldOrder field_order = AV_FIELD_UNKNOWN;
|
|
enum AVColorRange color_range = AVCOL_RANGE_UNSPECIFIED;
|
|
AVStream *st;
|
|
int64_t data_offset;
|
|
|
|
for (i = 0; i < MAX_YUV4_HEADER; i++) {
|
|
header[i] = avio_r8(pb);
|
|
if (header[i] == '\n') {
|
|
header[i + 1] = 0x20; // Add a space after last option.
|
|
// Makes parsing "444" vs "444alpha" easier.
|
|
header[i + 2] = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (i == MAX_YUV4_HEADER) {
|
|
av_log(s, AV_LOG_ERROR, "Header too large.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid magic number for yuv4mpeg.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
header_end = &header[i + 1]; // Include space
|
|
for (tokstart = &header[strlen(Y4M_MAGIC) + 1];
|
|
tokstart < header_end; tokstart++) {
|
|
if (*tokstart == 0x20)
|
|
continue;
|
|
switch (*tokstart++) {
|
|
case 'W': // Width. Required.
|
|
width = strtol(tokstart, &tokend, 10);
|
|
tokstart = tokend;
|
|
break;
|
|
case 'H': // Height. Required.
|
|
height = strtol(tokstart, &tokend, 10);
|
|
tokstart = tokend;
|
|
break;
|
|
case 'C': // Color space
|
|
{
|
|
static const struct {
|
|
#define MAX_PIX_FMT_LENGTH 8
|
|
char name[MAX_PIX_FMT_LENGTH + 1];
|
|
#undef MAX_PIX_FMT_LENGTH
|
|
enum AVPixelFormat pix_fmt;
|
|
enum AVChromaLocation chroma_loc;
|
|
} pix_fmt_array[] = {
|
|
{ "420jpeg", AV_PIX_FMT_YUV420P, AVCHROMA_LOC_CENTER },
|
|
{ "420mpeg2", AV_PIX_FMT_YUV420P, AVCHROMA_LOC_LEFT },
|
|
{ "420paldv", AV_PIX_FMT_YUV420P, AVCHROMA_LOC_TOPLEFT },
|
|
{ "420p16", AV_PIX_FMT_YUV420P16, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "422p16", AV_PIX_FMT_YUV422P16, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "444p16", AV_PIX_FMT_YUV444P16, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "420p14", AV_PIX_FMT_YUV420P14, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "422p14", AV_PIX_FMT_YUV422P14, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "444p14", AV_PIX_FMT_YUV444P14, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "420p12", AV_PIX_FMT_YUV420P12, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "422p12", AV_PIX_FMT_YUV422P12, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "444p12", AV_PIX_FMT_YUV444P12, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "420p10", AV_PIX_FMT_YUV420P10, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "422p10", AV_PIX_FMT_YUV422P10, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "444p10", AV_PIX_FMT_YUV444P10, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "420p9", AV_PIX_FMT_YUV420P9, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "422p9", AV_PIX_FMT_YUV422P9, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "444p9", AV_PIX_FMT_YUV444P9, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "420", AV_PIX_FMT_YUV420P, AVCHROMA_LOC_CENTER },
|
|
{ "411", AV_PIX_FMT_YUV411P, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "422", AV_PIX_FMT_YUV422P, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "444alpha", AV_PIX_FMT_YUVA444P, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "444", AV_PIX_FMT_YUV444P, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "mono16", AV_PIX_FMT_GRAY16, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "mono12", AV_PIX_FMT_GRAY12, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "mono10", AV_PIX_FMT_GRAY10, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "mono9", AV_PIX_FMT_GRAY9, AVCHROMA_LOC_UNSPECIFIED },
|
|
{ "mono", AV_PIX_FMT_GRAY8, AVCHROMA_LOC_UNSPECIFIED },
|
|
};
|
|
for (i = 0; i < FF_ARRAY_ELEMS(pix_fmt_array); i++) {
|
|
if (av_strstart(tokstart, pix_fmt_array[i].name, NULL)) {
|
|
pix_fmt = pix_fmt_array[i].pix_fmt;
|
|
if (pix_fmt_array[i].chroma_loc != AVCHROMA_LOC_UNSPECIFIED)
|
|
chroma_sample_location = pix_fmt_array[i].chroma_loc;
|
|
break;
|
|
}
|
|
}
|
|
if (i == FF_ARRAY_ELEMS(pix_fmt_array)) {
|
|
av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown "
|
|
"pixel format.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
while (tokstart < header_end && *tokstart != 0x20)
|
|
tokstart++;
|
|
break;
|
|
}
|
|
case 'I': // Interlace type
|
|
switch (*tokstart++){
|
|
case '?':
|
|
field_order = AV_FIELD_UNKNOWN;
|
|
break;
|
|
case 'p':
|
|
field_order = AV_FIELD_PROGRESSIVE;
|
|
break;
|
|
case 't':
|
|
field_order = AV_FIELD_TT;
|
|
break;
|
|
case 'b':
|
|
field_order = AV_FIELD_BB;
|
|
break;
|
|
case 'm':
|
|
av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed "
|
|
"interlaced and non-interlaced frames.\n");
|
|
default:
|
|
av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
break;
|
|
case 'F': // Frame rate
|
|
sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown
|
|
while (tokstart < header_end && *tokstart != 0x20)
|
|
tokstart++;
|
|
break;
|
|
case 'A': // Pixel aspect
|
|
sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown
|
|
while (tokstart < header_end && *tokstart != 0x20)
|
|
tokstart++;
|
|
break;
|
|
case 'X': // Vendor extensions
|
|
if (strncmp("YSCSS=", tokstart, 6) == 0) {
|
|
static const struct {
|
|
#define MAX_PIX_FMT_LENGTH 8
|
|
char name[MAX_PIX_FMT_LENGTH + 1];
|
|
#undef MAX_PIX_FMT_LENGTH
|
|
enum AVPixelFormat pix_fmt;
|
|
} pix_fmt_array[] = {
|
|
{ "420JPEG", AV_PIX_FMT_YUV420P },
|
|
{ "420MPEG2", AV_PIX_FMT_YUV420P },
|
|
{ "420PALDV", AV_PIX_FMT_YUV420P },
|
|
{ "420P9", AV_PIX_FMT_YUV420P9 },
|
|
{ "422P9", AV_PIX_FMT_YUV422P9 },
|
|
{ "444P9", AV_PIX_FMT_YUV444P9 },
|
|
{ "420P10", AV_PIX_FMT_YUV420P10 },
|
|
{ "444P10", AV_PIX_FMT_YUV444P10 },
|
|
{ "420P12", AV_PIX_FMT_YUV420P12 },
|
|
{ "422P12", AV_PIX_FMT_YUV422P12 },
|
|
{ "444P12", AV_PIX_FMT_YUV444P12 },
|
|
{ "420P14", AV_PIX_FMT_YUV420P14 },
|
|
{ "422P14", AV_PIX_FMT_YUV422P14 },
|
|
{ "444P14", AV_PIX_FMT_YUV444P14 },
|
|
{ "420P16", AV_PIX_FMT_YUV420P16 },
|
|
{ "422P16", AV_PIX_FMT_YUV422P16 },
|
|
{ "444P16", AV_PIX_FMT_YUV444P16 },
|
|
{ "411", AV_PIX_FMT_YUV411P },
|
|
{ "422", AV_PIX_FMT_YUV422P },
|
|
{ "444", AV_PIX_FMT_YUV444P },
|
|
};
|
|
// Older nonstandard pixel format representation
|
|
tokstart += 6;
|
|
for (size_t i = 0; i < FF_ARRAY_ELEMS(pix_fmt_array); i++)
|
|
if (av_strstart(tokstart, pix_fmt_array[i].name, NULL)) {
|
|
alt_pix_fmt = pix_fmt_array[i].pix_fmt;
|
|
break;
|
|
}
|
|
} else if (strncmp("COLORRANGE=", tokstart, 11) == 0) {
|
|
tokstart += 11;
|
|
if (strncmp("FULL",tokstart, 4) == 0)
|
|
color_range = AVCOL_RANGE_JPEG;
|
|
else if (strncmp("LIMITED", tokstart, 7) == 0)
|
|
color_range = AVCOL_RANGE_MPEG;
|
|
}
|
|
while (tokstart < header_end && *tokstart != 0x20)
|
|
tokstart++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (width == -1 || height == -1) {
|
|
av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (pix_fmt == AV_PIX_FMT_NONE) {
|
|
if (alt_pix_fmt == AV_PIX_FMT_NONE)
|
|
pix_fmt = AV_PIX_FMT_YUV420P;
|
|
else
|
|
pix_fmt = alt_pix_fmt;
|
|
}
|
|
|
|
if (raten <= 0 || rated <= 0) {
|
|
// Frame rate unknown
|
|
raten = 25;
|
|
rated = 1;
|
|
}
|
|
|
|
if (aspectn == 0 && aspectd == 0) {
|
|
// Pixel aspect unknown
|
|
aspectd = 1;
|
|
}
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
st->codecpar->width = width;
|
|
st->codecpar->height = height;
|
|
av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1);
|
|
avpriv_set_pts_info(st, 64, rated, raten);
|
|
st->avg_frame_rate = av_inv_q(st->time_base);
|
|
st->codecpar->format = pix_fmt;
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
|
|
st->sample_aspect_ratio = (AVRational){ aspectn, aspectd };
|
|
st->codecpar->chroma_location = chroma_sample_location;
|
|
st->codecpar->color_range = color_range;
|
|
st->codecpar->field_order = field_order;
|
|
s->packet_size = av_image_get_buffer_size(st->codecpar->format, width, height, 1) + Y4M_FRAME_MAGIC_LEN;
|
|
if ((int) s->packet_size < 0)
|
|
return s->packet_size;
|
|
ffformatcontext(s)->data_offset = data_offset = avio_tell(pb);
|
|
|
|
st->duration = (avio_size(pb) - data_offset) / s->packet_size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int i;
|
|
char header[MAX_FRAME_HEADER+1];
|
|
int ret;
|
|
int64_t off = avio_tell(s->pb);
|
|
|
|
for (i = 0; i < MAX_FRAME_HEADER; i++) {
|
|
header[i] = avio_r8(s->pb);
|
|
if (header[i] == '\n') {
|
|
header[i + 1] = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (s->pb->error)
|
|
return s->pb->error;
|
|
else if (s->pb->eof_reached)
|
|
return AVERROR_EOF;
|
|
else if (i == MAX_FRAME_HEADER)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC)))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
ret = av_get_packet(s->pb, pkt, s->packet_size - Y4M_FRAME_MAGIC_LEN);
|
|
if (ret < 0)
|
|
return ret;
|
|
else if (ret != s->packet_size - Y4M_FRAME_MAGIC_LEN) {
|
|
return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO);
|
|
}
|
|
pkt->stream_index = 0;
|
|
pkt->pts = (off - ffformatcontext(s)->data_offset) / s->packet_size;
|
|
pkt->duration = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_read_seek(AVFormatContext *s, int stream_index,
|
|
int64_t pts, int flags)
|
|
{
|
|
int64_t pos;
|
|
|
|
if (flags & AVSEEK_FLAG_BACKWARD)
|
|
pts = FFMAX(0, pts - 1);
|
|
if (pts < 0)
|
|
return -1;
|
|
pos = pts * s->packet_size;
|
|
|
|
if (avio_seek(s->pb, pos + ffformatcontext(s)->data_offset, SEEK_SET) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_probe(const AVProbeData *pd)
|
|
{
|
|
/* check file header */
|
|
if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0)
|
|
return AVPROBE_SCORE_MAX;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
const AVInputFormat ff_yuv4mpegpipe_demuxer = {
|
|
.name = "yuv4mpegpipe",
|
|
.long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
|
|
.read_probe = yuv4_probe,
|
|
.read_header = yuv4_read_header,
|
|
.read_packet = yuv4_read_packet,
|
|
.read_seek = yuv4_read_seek,
|
|
.extensions = "y4m",
|
|
};
|