2 * Copyright (c) 2010 Stefano Sabatini
3 * Copyright (c) 2008 Victor Paesa
5 * This file is part of FFmpeg.
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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/avstring.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/imgutils.h"
37 #include "libavformat/avformat.h"
45 /* common A/V fields */
47 int64_t seek_point; ///< seekpoint in microseconds
54 AVFormatContext *format_ctx;
55 AVCodecContext *codec_ctx;
57 AVFrame *frame; ///< video frame to store the decoded images in
59 /* video-only fields */
61 AVFilterBufferRef *picref;
63 /* audio-only fields */
64 int bps; ///< bytes per sample
66 AVFilterBufferRef *samplesref;
69 #define OFFSET(x) offsetof(MovieContext, x)
71 static const AVOption movie_options[]= {
72 {"format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX },
73 {"f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX },
74 {"stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX },
75 {"si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX },
76 {"seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 },
77 {"sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 },
78 {"loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.dbl = 1}, 0, INT_MAX },
82 static const AVClass movie_class = {
88 static av_cold int movie_common_init(AVFilterContext *ctx, const char *args, void *opaque,
89 enum AVMediaType type)
91 MovieContext *movie = ctx->priv;
92 AVInputFormat *iformat = NULL;
97 movie->class = &movie_class;
98 av_opt_set_defaults(movie);
101 movie->file_name = av_get_token(&args, ":");
102 if (!movie->file_name || !*movie->file_name) {
103 av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
104 return AVERROR(EINVAL);
107 if (*args++ == ':' && (ret = av_set_options_string(movie, args, "=", ":")) < 0) {
108 av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
112 movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
116 // Try to find the movie format (container)
117 iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
119 movie->format_ctx = NULL;
120 if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
121 av_log(ctx, AV_LOG_ERROR,
122 "Failed to avformat_open_input '%s'\n", movie->file_name);
125 if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
126 av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
128 // if seeking requested, we execute it
129 if (movie->seek_point > 0) {
130 timestamp = movie->seek_point;
131 // add the stream start time, should it exist
132 if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
133 if (timestamp > INT64_MAX - movie->format_ctx->start_time) {
134 av_log(ctx, AV_LOG_ERROR,
135 "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
136 movie->file_name, movie->format_ctx->start_time, movie->seek_point);
137 return AVERROR(EINVAL);
139 timestamp += movie->format_ctx->start_time;
141 if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
142 av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
143 movie->file_name, timestamp);
148 /* select the media stream */
149 if ((ret = av_find_best_stream(movie->format_ctx, type,
150 movie->stream_index, -1, NULL, 0)) < 0) {
151 av_log(ctx, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
152 av_get_media_type_string(type), movie->stream_index);
155 movie->stream_index = ret;
156 movie->codec_ctx = movie->format_ctx->streams[movie->stream_index]->codec;
159 * So now we've got a pointer to the so-called codec context for our video
160 * stream, but we still have to find the actual codec and open it.
162 codec = avcodec_find_decoder(movie->codec_ctx->codec_id);
164 av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n");
165 return AVERROR(EINVAL);
168 if ((ret = avcodec_open2(movie->codec_ctx, codec, NULL)) < 0) {
169 av_log(ctx, AV_LOG_ERROR, "Failed to open codec\n");
173 av_log(ctx, AV_LOG_INFO, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
174 movie->seek_point, movie->format_name, movie->file_name,
175 movie->stream_index);
177 if (!(movie->frame = avcodec_alloc_frame()) ) {
178 av_log(ctx, AV_LOG_ERROR, "Failed to alloc frame\n");
179 return AVERROR(ENOMEM);
185 static av_cold void movie_common_uninit(AVFilterContext *ctx)
187 MovieContext *movie = ctx->priv;
189 av_free(movie->file_name);
190 av_free(movie->format_name);
191 if (movie->codec_ctx)
192 avcodec_close(movie->codec_ctx);
193 if (movie->format_ctx)
194 avformat_close_input(&movie->format_ctx);
196 avfilter_unref_buffer(movie->picref);
197 av_freep(&movie->frame);
199 avfilter_unref_buffer(movie->samplesref);
202 #if CONFIG_MOVIE_FILTER
204 static av_cold int movie_init(AVFilterContext *ctx, const char *args, void *opaque)
206 MovieContext *movie = ctx->priv;
209 if ((ret = movie_common_init(ctx, args, opaque, AVMEDIA_TYPE_VIDEO)) < 0)
212 movie->w = movie->codec_ctx->width;
213 movie->h = movie->codec_ctx->height;
218 static int movie_query_formats(AVFilterContext *ctx)
220 MovieContext *movie = ctx->priv;
221 enum PixelFormat pix_fmts[] = { movie->codec_ctx->pix_fmt, PIX_FMT_NONE };
223 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
227 static int movie_config_output_props(AVFilterLink *outlink)
229 MovieContext *movie = outlink->src->priv;
231 outlink->w = movie->w;
232 outlink->h = movie->h;
233 outlink->time_base = movie->format_ctx->streams[movie->stream_index]->time_base;
238 static int movie_get_frame(AVFilterLink *outlink)
240 MovieContext *movie = outlink->src->priv;
242 int ret, frame_decoded;
243 AVStream *st = movie->format_ctx->streams[movie->stream_index];
245 if (movie->is_done == 1)
249 ret = av_read_frame(movie->format_ctx, &pkt);
250 if (ret == AVERROR_EOF) {
252 if (movie->loop_count != 1) {
253 timestamp = movie->seek_point;
254 if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
255 timestamp += movie->format_ctx->start_time;
256 if (av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD) < 0) {
259 } else if (movie->loop_count>1)
269 // Is this a packet from the video stream?
270 if (pkt.stream_index == movie->stream_index) {
271 avcodec_decode_video2(movie->codec_ctx, movie->frame, &frame_decoded, &pkt);
274 /* FIXME: avoid the memcpy */
275 movie->picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE | AV_PERM_PRESERVE |
276 AV_PERM_REUSE2, outlink->w, outlink->h);
277 av_image_copy(movie->picref->data, movie->picref->linesize,
278 (void*)movie->frame->data, movie->frame->linesize,
279 movie->picref->format, outlink->w, outlink->h);
280 avfilter_copy_frame_props(movie->picref, movie->frame);
282 /* FIXME: use a PTS correction mechanism as that in
283 * ffplay.c when some API will be available for that */
284 /* use pkt_dts if pkt_pts is not available */
285 movie->picref->pts = movie->frame->pkt_pts == AV_NOPTS_VALUE ?
286 movie->frame->pkt_dts : movie->frame->pkt_pts;
288 if (!movie->frame->sample_aspect_ratio.num)
289 movie->picref->video->sample_aspect_ratio = st->sample_aspect_ratio;
290 av_dlog(outlink->src,
291 "movie_get_frame(): file:'%s' pts:%"PRId64" time:%lf pos:%"PRId64" aspect:%d/%d\n",
292 movie->file_name, movie->picref->pts,
293 (double)movie->picref->pts * av_q2d(st->time_base),
295 movie->picref->video->sample_aspect_ratio.num,
296 movie->picref->video->sample_aspect_ratio.den);
297 // We got it. Free the packet since we are returning
298 av_free_packet(&pkt);
303 // Free the packet that was allocated by av_read_frame
304 av_free_packet(&pkt);
310 static int movie_request_frame(AVFilterLink *outlink)
312 AVFilterBufferRef *outpicref;
313 MovieContext *movie = outlink->src->priv;
318 if ((ret = movie_get_frame(outlink)) < 0)
321 outpicref = avfilter_ref_buffer(movie->picref, ~0);
322 ff_start_frame(outlink, outpicref);
323 ff_draw_slice(outlink, 0, outlink->h, 1);
324 ff_end_frame(outlink);
325 avfilter_unref_buffer(movie->picref);
326 movie->picref = NULL;
331 AVFilter avfilter_vsrc_movie = {
333 .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
334 .priv_size = sizeof(MovieContext),
336 .uninit = movie_common_uninit,
337 .query_formats = movie_query_formats,
339 .inputs = (const AVFilterPad[]) {{ .name = NULL }},
340 .outputs = (const AVFilterPad[]) {{ .name = "default",
341 .type = AVMEDIA_TYPE_VIDEO,
342 .request_frame = movie_request_frame,
343 .config_props = movie_config_output_props, },
347 #endif /* CONFIG_MOVIE_FILTER */
349 #if CONFIG_AMOVIE_FILTER
351 static av_cold int amovie_init(AVFilterContext *ctx, const char *args, void *opaque)
353 MovieContext *movie = ctx->priv;
356 if ((ret = movie_common_init(ctx, args, opaque, AVMEDIA_TYPE_AUDIO)) < 0)
359 movie->bps = av_get_bytes_per_sample(movie->codec_ctx->sample_fmt);
363 static int amovie_query_formats(AVFilterContext *ctx)
365 MovieContext *movie = ctx->priv;
366 AVCodecContext *c = movie->codec_ctx;
368 enum AVSampleFormat sample_fmts[] = { c->sample_fmt, -1 };
369 int sample_rates[] = { c->sample_rate, -1 };
370 int64_t chlayouts[] = { c->channel_layout ? c->channel_layout :
371 av_get_default_channel_layout(c->channels), -1 };
373 avfilter_set_common_sample_formats (ctx, avfilter_make_format_list(sample_fmts));
374 ff_set_common_samplerates (ctx, avfilter_make_format_list(sample_rates));
375 ff_set_common_channel_layouts(ctx, avfilter_make_format64_list(chlayouts));
380 static int amovie_config_output_props(AVFilterLink *outlink)
382 MovieContext *movie = outlink->src->priv;
383 AVCodecContext *c = movie->codec_ctx;
385 outlink->sample_rate = c->sample_rate;
386 outlink->time_base = movie->format_ctx->streams[movie->stream_index]->time_base;
391 static int amovie_get_samples(AVFilterLink *outlink)
393 MovieContext *movie = outlink->src->priv;
395 int ret, got_frame = 0;
397 if (!movie->pkt.size && movie->is_done == 1)
400 /* check for another frame, in case the previous one was completely consumed */
401 if (!movie->pkt.size) {
402 while ((ret = av_read_frame(movie->format_ctx, &pkt)) >= 0) {
403 // Is this a packet from the selected stream?
404 if (pkt.stream_index != movie->stream_index) {
405 av_free_packet(&pkt);
408 movie->pkt0 = movie->pkt = pkt;
413 if (ret == AVERROR_EOF) {
419 /* decode and update the movie pkt */
420 avcodec_get_frame_defaults(movie->frame);
421 ret = avcodec_decode_audio4(movie->codec_ctx, movie->frame, &got_frame, &movie->pkt);
426 movie->pkt.data += ret;
427 movie->pkt.size -= ret;
429 /* wrap the decoded data in a samplesref */
431 int nb_samples = movie->frame->nb_samples;
433 av_samples_get_buffer_size(NULL, movie->codec_ctx->channels,
434 nb_samples, movie->codec_ctx->sample_fmt, 1);
438 ff_get_audio_buffer(outlink, AV_PERM_WRITE, nb_samples);
439 memcpy(movie->samplesref->data[0], movie->frame->data[0], data_size);
440 movie->samplesref->pts = movie->pkt.pts;
441 movie->samplesref->pos = movie->pkt.pos;
442 movie->samplesref->audio->sample_rate = movie->codec_ctx->sample_rate;
445 // We got it. Free the packet since we are returning
446 if (movie->pkt.size <= 0)
447 av_free_packet(&movie->pkt0);
452 static int amovie_request_frame(AVFilterLink *outlink)
454 MovieContext *movie = outlink->src->priv;
460 if ((ret = amovie_get_samples(outlink)) < 0)
462 } while (!movie->samplesref);
464 ff_filter_samples(outlink, avfilter_ref_buffer(movie->samplesref, ~0));
465 avfilter_unref_buffer(movie->samplesref);
466 movie->samplesref = NULL;
471 AVFilter avfilter_asrc_amovie = {
473 .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
474 .priv_size = sizeof(MovieContext),
476 .uninit = movie_common_uninit,
477 .query_formats = amovie_query_formats,
479 .inputs = (const AVFilterPad[]) {{ .name = NULL }},
480 .outputs = (const AVFilterPad[]) {{ .name = "default",
481 .type = AVMEDIA_TYPE_AUDIO,
482 .request_frame = amovie_request_frame,
483 .config_props = amovie_config_output_props, },
487 #endif /* CONFIG_AMOVIE_FILTER */