2 * Copyright (c) 2010 Stefano Sabatini
3 * Copyright (c) 2008 Victor Paesa
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * @todo use direct rendering (no allocation of a new frame)
27 * @todo support a PTS correction mechanism
28 * @todo support more than one output stream
34 #include "libavutil/attributes.h"
35 #include "libavutil/avstring.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/imgutils.h"
38 #include "libavformat/avformat.h"
44 typedef struct MovieContext {
46 int64_t seek_point; ///< seekpoint in microseconds
52 AVFormatContext *format_ctx;
53 AVCodecContext *codec_ctx;
55 AVFrame *frame; ///< video frame to store the decoded images in
60 #define OFFSET(x) offsetof(MovieContext, x)
61 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM
63 static const AVOption movie_options[]= {
64 { "filename", NULL, OFFSET(file_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
65 { "format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
66 { "f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
67 { "stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
68 { "si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
69 { "seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
70 { "sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
74 static const char *movie_get_name(void *ctx)
79 static const AVClass movie_class = {
85 static av_cold int movie_init(AVFilterContext *ctx)
87 MovieContext *movie = ctx->priv;
88 AVInputFormat *iformat = NULL;
95 // Try to find the movie format (container)
96 iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
98 movie->format_ctx = NULL;
99 if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
100 av_log(ctx, AV_LOG_ERROR,
101 "Failed to avformat_open_input '%s'\n", movie->file_name);
104 if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
105 av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
107 // if seeking requested, we execute it
108 if (movie->seek_point > 0) {
109 timestamp = movie->seek_point;
110 // add the stream start time, should it exist
111 if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
112 if (timestamp > INT64_MAX - movie->format_ctx->start_time) {
113 av_log(ctx, AV_LOG_ERROR,
114 "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
115 movie->file_name, movie->format_ctx->start_time, movie->seek_point);
116 return AVERROR(EINVAL);
118 timestamp += movie->format_ctx->start_time;
120 if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
121 av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
122 movie->file_name, timestamp);
127 /* select the video stream */
128 if ((ret = av_find_best_stream(movie->format_ctx, AVMEDIA_TYPE_VIDEO,
129 movie->stream_index, -1, NULL, 0)) < 0) {
130 av_log(ctx, AV_LOG_ERROR, "No video stream with index '%d' found\n",
131 movie->stream_index);
134 movie->stream_index = ret;
135 movie->codec_ctx = movie->format_ctx->streams[movie->stream_index]->codec;
138 * So now we've got a pointer to the so-called codec context for our video
139 * stream, but we still have to find the actual codec and open it.
141 codec = avcodec_find_decoder(movie->codec_ctx->codec_id);
143 av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n");
144 return AVERROR(EINVAL);
147 movie->codec_ctx->refcounted_frames = 1;
149 if ((ret = avcodec_open2(movie->codec_ctx, codec, NULL)) < 0) {
150 av_log(ctx, AV_LOG_ERROR, "Failed to open codec\n");
154 movie->w = movie->codec_ctx->width;
155 movie->h = movie->codec_ctx->height;
157 av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
158 movie->seek_point, movie->format_name, movie->file_name,
159 movie->stream_index);
164 static av_cold int init(AVFilterContext *ctx)
166 MovieContext *movie = ctx->priv;
168 movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
170 return movie_init(ctx);
173 static av_cold void uninit(AVFilterContext *ctx)
175 MovieContext *movie = ctx->priv;
177 if (movie->codec_ctx)
178 avcodec_close(movie->codec_ctx);
179 if (movie->format_ctx)
180 avformat_close_input(&movie->format_ctx);
181 av_frame_free(&movie->frame);
184 static int query_formats(AVFilterContext *ctx)
186 MovieContext *movie = ctx->priv;
187 enum AVPixelFormat pix_fmts[] = { movie->codec_ctx->pix_fmt, AV_PIX_FMT_NONE };
189 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
193 static int config_output_props(AVFilterLink *outlink)
195 MovieContext *movie = outlink->src->priv;
197 outlink->w = movie->w;
198 outlink->h = movie->h;
199 outlink->time_base = movie->format_ctx->streams[movie->stream_index]->time_base;
204 static int movie_get_frame(AVFilterLink *outlink)
206 MovieContext *movie = outlink->src->priv;
208 int ret, frame_decoded;
210 if (movie->is_done == 1)
213 movie->frame = av_frame_alloc();
215 return AVERROR(ENOMEM);
217 while ((ret = av_read_frame(movie->format_ctx, &pkt)) >= 0) {
218 // Is this a packet from the video stream?
219 if (pkt.stream_index == movie->stream_index) {
220 avcodec_decode_video2(movie->codec_ctx, movie->frame, &frame_decoded, &pkt);
223 if (movie->frame->pkt_pts != AV_NOPTS_VALUE)
224 movie->frame->pts = movie->frame->pkt_pts;
225 av_dlog(outlink->src,
226 "movie_get_frame(): file:'%s' pts:%"PRId64" time:%f aspect:%d/%d\n",
227 movie->file_name, movie->frame->pts,
228 (double)movie->frame->pts *
229 av_q2d(movie->format_ctx->streams[movie->stream_index]->time_base),
230 movie->frame->sample_aspect_ratio.num,
231 movie->frame->sample_aspect_ratio.den);
232 // We got it. Free the packet since we are returning
233 av_free_packet(&pkt);
238 // Free the packet that was allocated by av_read_frame
239 av_free_packet(&pkt);
242 // On multi-frame source we should stop the mixing process when
243 // the movie source does not have more frames
244 if (ret == AVERROR_EOF)
249 static int request_frame(AVFilterLink *outlink)
251 MovieContext *movie = outlink->src->priv;
256 if ((ret = movie_get_frame(outlink)) < 0)
259 ret = ff_filter_frame(outlink, movie->frame);
265 static const AVFilterPad avfilter_vsrc_movie_outputs[] = {
268 .type = AVMEDIA_TYPE_VIDEO,
269 .request_frame = request_frame,
270 .config_props = config_output_props,
275 AVFilter ff_vsrc_movie = {
277 .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
278 .priv_size = sizeof(MovieContext),
279 .priv_class = &movie_class,
282 .query_formats = query_formats,
285 .outputs = avfilter_vsrc_movie_outputs,