Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
tree: 6bd643a676
Fetching contributors…

Cannot retrieve contributors at this time

472 lines (390 sloc) 16.193 kb
/*
* Copyright (c) 2010 Stefano Sabatini
* Copyright (c) 2008 Victor Paesa
*
* 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
*/
/**
* @file
* movie video source
*
* @todo use direct rendering (no allocation of a new frame)
* @todo support a PTS correction mechanism
* @todo support more than one output stream
*/
/* #define DEBUG */
#include <float.h>
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "libavformat/avformat.h"
#include "avcodec.h"
#include "avfilter.h"
typedef struct {
/* common A/V fields */
const AVClass *class;
int64_t seek_point; ///< seekpoint in microseconds
double seek_point_d;
char *format_name;
char *file_name;
int stream_index;
AVFormatContext *format_ctx;
AVCodecContext *codec_ctx;
int is_done;
AVFrame *frame; ///< video frame to store the decoded images in
/* video-only fields */
int w, h;
AVFilterBufferRef *picref;
/* audio-only fields */
int bps; ///< bytes per sample
AVPacket pkt, pkt0;
AVFilterBufferRef *samplesref;
} MovieContext;
#define OFFSET(x) offsetof(MovieContext, x)
static const AVOption movie_options[]= {
{"format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX },
{"f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX },
{"stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX },
{"si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX },
{"seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 },
{"sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 },
{NULL},
};
static const char *movie_get_name(void *ctx)
{
return "movie";
}
static const AVClass movie_class = {
"MovieContext",
movie_get_name,
movie_options
};
static av_cold int movie_common_init(AVFilterContext *ctx, const char *args, void *opaque,
enum AVMediaType type)
{
MovieContext *movie = ctx->priv;
AVInputFormat *iformat = NULL;
AVCodec *codec;
int64_t timestamp;
int ret;
movie->class = &movie_class;
av_opt_set_defaults(movie);
if (args)
movie->file_name = av_get_token(&args, ":");
if (!movie->file_name || !*movie->file_name) {
av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
return AVERROR(EINVAL);
}
if (*args++ == ':' && (ret = av_set_options_string(movie, args, "=", ":")) < 0) {
av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
return ret;
}
movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
av_register_all();
// Try to find the movie format (container)
iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
movie->format_ctx = NULL;
if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
av_log(ctx, AV_LOG_ERROR,
"Failed to avformat_open_input '%s'\n", movie->file_name);
return ret;
}
if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
// if seeking requested, we execute it
if (movie->seek_point > 0) {
timestamp = movie->seek_point;
// add the stream start time, should it exist
if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
if (timestamp > INT64_MAX - movie->format_ctx->start_time) {
av_log(ctx, AV_LOG_ERROR,
"%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
movie->file_name, movie->format_ctx->start_time, movie->seek_point);
return AVERROR(EINVAL);
}
timestamp += movie->format_ctx->start_time;
}
if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
movie->file_name, timestamp);
return ret;
}
}
/* select the media stream */
if ((ret = av_find_best_stream(movie->format_ctx, type,
movie->stream_index, -1, NULL, 0)) < 0) {
av_log(ctx, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
av_get_media_type_string(type), movie->stream_index);
return ret;
}
movie->stream_index = ret;
movie->codec_ctx = movie->format_ctx->streams[movie->stream_index]->codec;
/*
* So now we've got a pointer to the so-called codec context for our video
* stream, but we still have to find the actual codec and open it.
*/
codec = avcodec_find_decoder(movie->codec_ctx->codec_id);
if (!codec) {
av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n");
return AVERROR(EINVAL);
}
if ((ret = avcodec_open2(movie->codec_ctx, codec, NULL)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Failed to open codec\n");
return ret;
}
av_log(ctx, AV_LOG_INFO, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
movie->seek_point, movie->format_name, movie->file_name,
movie->stream_index);
if (!(movie->frame = avcodec_alloc_frame()) ) {
av_log(ctx, AV_LOG_ERROR, "Failed to alloc frame\n");
return AVERROR(ENOMEM);
}
return 0;
}
static av_cold void movie_common_uninit(AVFilterContext *ctx)
{
MovieContext *movie = ctx->priv;
av_free(movie->file_name);
av_free(movie->format_name);
if (movie->codec_ctx)
avcodec_close(movie->codec_ctx);
if (movie->format_ctx)
avformat_close_input(&movie->format_ctx);
avfilter_unref_buffer(movie->picref);
av_freep(&movie->frame);
avfilter_unref_buffer(movie->samplesref);
}
#if CONFIG_MOVIE_FILTER
static av_cold int movie_init(AVFilterContext *ctx, const char *args, void *opaque)
{
MovieContext *movie = ctx->priv;
int ret;
if ((ret = movie_common_init(ctx, args, opaque, AVMEDIA_TYPE_VIDEO)) < 0)
return ret;
movie->w = movie->codec_ctx->width;
movie->h = movie->codec_ctx->height;
return 0;
}
static int movie_query_formats(AVFilterContext *ctx)
{
MovieContext *movie = ctx->priv;
enum PixelFormat pix_fmts[] = { movie->codec_ctx->pix_fmt, PIX_FMT_NONE };
avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
return 0;
}
static int movie_config_output_props(AVFilterLink *outlink)
{
MovieContext *movie = outlink->src->priv;
outlink->w = movie->w;
outlink->h = movie->h;
outlink->time_base = movie->format_ctx->streams[movie->stream_index]->time_base;
return 0;
}
static int movie_get_frame(AVFilterLink *outlink)
{
MovieContext *movie = outlink->src->priv;
AVPacket pkt;
int ret, frame_decoded;
AVStream *st = movie->format_ctx->streams[movie->stream_index];
if (movie->is_done == 1)
return 0;
while ((ret = av_read_frame(movie->format_ctx, &pkt)) >= 0) {
// Is this a packet from the video stream?
if (pkt.stream_index == movie->stream_index) {
avcodec_decode_video2(movie->codec_ctx, movie->frame, &frame_decoded, &pkt);
if (frame_decoded) {
/* FIXME: avoid the memcpy */
movie->picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE | AV_PERM_PRESERVE |
AV_PERM_REUSE2, outlink->w, outlink->h);
av_image_copy(movie->picref->data, movie->picref->linesize,
(void*)movie->frame->data, movie->frame->linesize,
movie->picref->format, outlink->w, outlink->h);
avfilter_copy_frame_props(movie->picref, movie->frame);
/* FIXME: use a PTS correction mechanism as that in
* ffplay.c when some API will be available for that */
/* use pkt_dts if pkt_pts is not available */
movie->picref->pts = movie->frame->pkt_pts == AV_NOPTS_VALUE ?
movie->frame->pkt_dts : movie->frame->pkt_pts;
if (!movie->frame->sample_aspect_ratio.num)
movie->picref->video->sample_aspect_ratio = st->sample_aspect_ratio;
av_dlog(outlink->src,
"movie_get_frame(): file:'%s' pts:%"PRId64" time:%lf pos:%"PRId64" aspect:%d/%d\n",
movie->file_name, movie->picref->pts,
(double)movie->picref->pts * av_q2d(st->time_base),
movie->picref->pos,
movie->picref->video->sample_aspect_ratio.num,
movie->picref->video->sample_aspect_ratio.den);
// We got it. Free the packet since we are returning
av_free_packet(&pkt);
return 0;
}
}
// Free the packet that was allocated by av_read_frame
av_free_packet(&pkt);
}
// On multi-frame source we should stop the mixing process when
// the movie source does not have more frames
if (ret == AVERROR_EOF)
movie->is_done = 1;
return ret;
}
static int movie_request_frame(AVFilterLink *outlink)
{
AVFilterBufferRef *outpicref;
MovieContext *movie = outlink->src->priv;
int ret;
if (movie->is_done)
return AVERROR_EOF;
if ((ret = movie_get_frame(outlink)) < 0)
return ret;
outpicref = avfilter_ref_buffer(movie->picref, ~0);
avfilter_start_frame(outlink, outpicref);
avfilter_draw_slice(outlink, 0, outlink->h, 1);
avfilter_end_frame(outlink);
avfilter_unref_buffer(movie->picref);
movie->picref = NULL;
return 0;
}
AVFilter avfilter_vsrc_movie = {
.name = "movie",
.description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
.priv_size = sizeof(MovieContext),
.init = movie_init,
.uninit = movie_common_uninit,
.query_formats = movie_query_formats,
.inputs = (const AVFilterPad[]) {{ .name = NULL }},
.outputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = movie_request_frame,
.config_props = movie_config_output_props, },
{ .name = NULL}},
};
#endif /* CONFIG_MOVIE_FILTER */
#if CONFIG_AMOVIE_FILTER
static av_cold int amovie_init(AVFilterContext *ctx, const char *args, void *opaque)
{
MovieContext *movie = ctx->priv;
int ret;
if ((ret = movie_common_init(ctx, args, opaque, AVMEDIA_TYPE_AUDIO)) < 0)
return ret;
movie->bps = av_get_bytes_per_sample(movie->codec_ctx->sample_fmt);
return 0;
}
static int amovie_query_formats(AVFilterContext *ctx)
{
MovieContext *movie = ctx->priv;
AVCodecContext *c = movie->codec_ctx;
enum AVSampleFormat sample_fmts[] = { c->sample_fmt, -1 };
int packing_fmts[] = { AVFILTER_PACKED, -1 };
int64_t chlayouts[] = { c->channel_layout ? c->channel_layout :
av_get_default_channel_layout(c->channels), -1 };
avfilter_set_common_sample_formats (ctx, avfilter_make_format_list(sample_fmts));
avfilter_set_common_packing_formats(ctx, avfilter_make_format_list(packing_fmts));
avfilter_set_common_channel_layouts(ctx, avfilter_make_format64_list(chlayouts));
return 0;
}
static int amovie_config_output_props(AVFilterLink *outlink)
{
MovieContext *movie = outlink->src->priv;
AVCodecContext *c = movie->codec_ctx;
outlink->sample_rate = c->sample_rate;
outlink->time_base = movie->format_ctx->streams[movie->stream_index]->time_base;
return 0;
}
static int amovie_get_samples(AVFilterLink *outlink)
{
MovieContext *movie = outlink->src->priv;
AVPacket pkt;
int ret, got_frame = 0;
if (!movie->pkt.size && movie->is_done == 1)
return AVERROR_EOF;
/* check for another frame, in case the previous one was completely consumed */
if (!movie->pkt.size) {
while ((ret = av_read_frame(movie->format_ctx, &pkt)) >= 0) {
// Is this a packet from the selected stream?
if (pkt.stream_index != movie->stream_index) {
av_free_packet(&pkt);
continue;
} else {
movie->pkt0 = movie->pkt = pkt;
break;
}
}
if (ret == AVERROR_EOF) {
movie->is_done = 1;
return ret;
}
}
/* decode and update the movie pkt */
avcodec_get_frame_defaults(movie->frame);
ret = avcodec_decode_audio4(movie->codec_ctx, movie->frame, &got_frame, &movie->pkt);
if (ret < 0) {
movie->pkt.size = 0;
return ret;
}
movie->pkt.data += ret;
movie->pkt.size -= ret;
/* wrap the decoded data in a samplesref */
if (got_frame) {
int nb_samples = movie->frame->nb_samples;
int data_size =
av_samples_get_buffer_size(NULL, movie->codec_ctx->channels,
nb_samples, movie->codec_ctx->sample_fmt, 1);
if (data_size < 0)
return data_size;
movie->samplesref =
avfilter_get_audio_buffer(outlink, AV_PERM_WRITE, nb_samples);
memcpy(movie->samplesref->data[0], movie->frame->data[0], data_size);
movie->samplesref->pts = movie->pkt.pts;
movie->samplesref->pos = movie->pkt.pos;
movie->samplesref->audio->sample_rate = movie->codec_ctx->sample_rate;
}
// We got it. Free the packet since we are returning
if (movie->pkt.size <= 0)
av_free_packet(&movie->pkt0);
return 0;
}
static int amovie_request_frame(AVFilterLink *outlink)
{
MovieContext *movie = outlink->src->priv;
int ret;
if (movie->is_done)
return AVERROR_EOF;
do {
if ((ret = amovie_get_samples(outlink)) < 0)
return ret;
} while (!movie->samplesref);
avfilter_filter_samples(outlink, avfilter_ref_buffer(movie->samplesref, ~0));
avfilter_unref_buffer(movie->samplesref);
movie->samplesref = NULL;
return 0;
}
AVFilter avfilter_asrc_amovie = {
.name = "amovie",
.description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
.priv_size = sizeof(MovieContext),
.init = amovie_init,
.uninit = movie_common_uninit,
.query_formats = amovie_query_formats,
.inputs = (const AVFilterPad[]) {{ .name = NULL }},
.outputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.request_frame = amovie_request_frame,
.config_props = amovie_config_output_props, },
{ .name = NULL}},
};
#endif /* CONFIG_AMOVIE_FILTER */
Jump to Line
Something went wrong with that request. Please try again.