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"
44 /* common A/V fields */
46 int64_t seek_point; ///< seekpoint in microseconds
53 AVFormatContext *format_ctx;
54 AVCodecContext *codec_ctx;
56 AVFrame *frame; ///< video frame to store the decoded images in
58 /* video-only fields */
60 AVFilterBufferRef *picref;
62 /* audio-only fields */
63 int bps; ///< bytes per sample
65 AVFilterBufferRef *samplesref;
68 #define OFFSET(x) offsetof(MovieContext, x)
70 static const AVOption movie_options[]= {
71 {"format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX },
72 {"f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX },
73 {"stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX },
74 {"si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX },
75 {"seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 },
76 {"sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 },
77 {"loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.dbl = 1}, 0, INT_MAX },
81 static const char *movie_get_name(void *ctx)
86 static const AVClass movie_class = {
92 static av_cold int movie_common_init(AVFilterContext *ctx, const char *args, void *opaque,
93 enum AVMediaType type)
95 MovieContext *movie = ctx->priv;
96 AVInputFormat *iformat = NULL;
101 movie->class = &movie_class;
102 av_opt_set_defaults(movie);
105 movie->file_name = av_get_token(&args, ":");
106 if (!movie->file_name || !*movie->file_name) {
107 av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
108 return AVERROR(EINVAL);
111 if (*args++ == ':' && (ret = av_set_options_string(movie, args, "=", ":")) < 0) {
112 av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
116 movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
120 // Try to find the movie format (container)
121 iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
123 movie->format_ctx = NULL;
124 if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
125 av_log(ctx, AV_LOG_ERROR,
126 "Failed to avformat_open_input '%s'\n", movie->file_name);
129 if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
130 av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
132 // if seeking requested, we execute it
133 if (movie->seek_point > 0) {
134 timestamp = movie->seek_point;
135 // add the stream start time, should it exist
136 if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
137 if (timestamp > INT64_MAX - movie->format_ctx->start_time) {
138 av_log(ctx, AV_LOG_ERROR,
139 "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
140 movie->file_name, movie->format_ctx->start_time, movie->seek_point);
141 return AVERROR(EINVAL);
143 timestamp += movie->format_ctx->start_time;
145 if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
146 av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
147 movie->file_name, timestamp);
152 /* select the media stream */
153 if ((ret = av_find_best_stream(movie->format_ctx, type,
154 movie->stream_index, -1, NULL, 0)) < 0) {
155 av_log(ctx, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
156 av_get_media_type_string(type), movie->stream_index);
159 movie->stream_index = ret;
160 movie->codec_ctx = movie->format_ctx->streams[movie->stream_index]->codec;
163 * So now we've got a pointer to the so-called codec context for our video
164 * stream, but we still have to find the actual codec and open it.
166 codec = avcodec_find_decoder(movie->codec_ctx->codec_id);
168 av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n");
169 return AVERROR(EINVAL);
172 if ((ret = avcodec_open2(movie->codec_ctx, codec, NULL)) < 0) {
173 av_log(ctx, AV_LOG_ERROR, "Failed to open codec\n");
177 av_log(ctx, AV_LOG_INFO, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
178 movie->seek_point, movie->format_name, movie->file_name,
179 movie->stream_index);
181 if (!(movie->frame = avcodec_alloc_frame()) ) {
182 av_log(ctx, AV_LOG_ERROR, "Failed to alloc frame\n");
183 return AVERROR(ENOMEM);
189 static av_cold void movie_common_uninit(AVFilterContext *ctx)
191 MovieContext *movie = ctx->priv;
193 av_free(movie->file_name);
194 av_free(movie->format_name);
195 if (movie->codec_ctx)
196 avcodec_close(movie->codec_ctx);
197 if (movie->format_ctx)
198 avformat_close_input(&movie->format_ctx);
200 avfilter_unref_buffer(movie->picref);
201 av_freep(&movie->frame);
203 avfilter_unref_buffer(movie->samplesref);
206 #if CONFIG_MOVIE_FILTER
208 static av_cold int movie_init(AVFilterContext *ctx, const char *args, void *opaque)
210 MovieContext *movie = ctx->priv;
213 if ((ret = movie_common_init(ctx, args, opaque, AVMEDIA_TYPE_VIDEO)) < 0)
216 movie->w = movie->codec_ctx->width;
217 movie->h = movie->codec_ctx->height;
222 static int movie_query_formats(AVFilterContext *ctx)
224 MovieContext *movie = ctx->priv;
225 enum PixelFormat pix_fmts[] = { movie->codec_ctx->pix_fmt, PIX_FMT_NONE };
227 avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
231 static int movie_config_output_props(AVFilterLink *outlink)
233 MovieContext *movie = outlink->src->priv;
235 outlink->w = movie->w;
236 outlink->h = movie->h;
237 outlink->time_base = movie->format_ctx->streams[movie->stream_index]->time_base;
242 static int movie_get_frame(AVFilterLink *outlink)
244 MovieContext *movie = outlink->src->priv;
246 int ret, frame_decoded;
247 AVStream *st = movie->format_ctx->streams[movie->stream_index];
249 if (movie->is_done == 1)
253 ret = av_read_frame(movie->format_ctx, &pkt);
254 if (ret == AVERROR_EOF) {
256 if (movie->loop_count != 1) {
257 timestamp = movie->seek_point;
258 if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
259 timestamp += movie->format_ctx->start_time;
260 if (av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD) < 0) {
263 } else if (movie->loop_count>1)
273 // Is this a packet from the video stream?
274 if (pkt.stream_index == movie->stream_index) {
275 avcodec_decode_video2(movie->codec_ctx, movie->frame, &frame_decoded, &pkt);
278 /* FIXME: avoid the memcpy */
279 movie->picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE | AV_PERM_PRESERVE |
280 AV_PERM_REUSE2, outlink->w, outlink->h);
281 av_image_copy(movie->picref->data, movie->picref->linesize,
282 (void*)movie->frame->data, movie->frame->linesize,
283 movie->picref->format, outlink->w, outlink->h);
284 avfilter_copy_frame_props(movie->picref, movie->frame);
286 /* FIXME: use a PTS correction mechanism as that in
287 * ffplay.c when some API will be available for that */
288 /* use pkt_dts if pkt_pts is not available */
289 movie->picref->pts = movie->frame->pkt_pts == AV_NOPTS_VALUE ?
290 movie->frame->pkt_dts : movie->frame->pkt_pts;
292 if (!movie->frame->sample_aspect_ratio.num)
293 movie->picref->video->sample_aspect_ratio = st->sample_aspect_ratio;
294 av_dlog(outlink->src,
295 "movie_get_frame(): file:'%s' pts:%"PRId64" time:%lf pos:%"PRId64" aspect:%d/%d\n",
296 movie->file_name, movie->picref->pts,
297 (double)movie->picref->pts * av_q2d(st->time_base),
299 movie->picref->video->sample_aspect_ratio.num,
300 movie->picref->video->sample_aspect_ratio.den);
301 // We got it. Free the packet since we are returning
302 av_free_packet(&pkt);
307 // Free the packet that was allocated by av_read_frame
308 av_free_packet(&pkt);
314 static int movie_request_frame(AVFilterLink *outlink)
316 AVFilterBufferRef *outpicref;
317 MovieContext *movie = outlink->src->priv;
322 if ((ret = movie_get_frame(outlink)) < 0)
325 outpicref = avfilter_ref_buffer(movie->picref, ~0);
326 avfilter_start_frame(outlink, outpicref);
327 avfilter_draw_slice(outlink, 0, outlink->h, 1);
328 avfilter_end_frame(outlink);
329 avfilter_unref_buffer(movie->picref);
330 movie->picref = NULL;
335 AVFilter avfilter_vsrc_movie = {
337 .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
338 .priv_size = sizeof(MovieContext),
340 .uninit = movie_common_uninit,
341 .query_formats = movie_query_formats,
343 .inputs = (const AVFilterPad[]) {{ .name = NULL }},
344 .outputs = (const AVFilterPad[]) {{ .name = "default",
345 .type = AVMEDIA_TYPE_VIDEO,
346 .request_frame = movie_request_frame,
347 .config_props = movie_config_output_props, },
351 #endif /* CONFIG_MOVIE_FILTER */
353 #if CONFIG_AMOVIE_FILTER
355 static av_cold int amovie_init(AVFilterContext *ctx, const char *args, void *opaque)
357 MovieContext *movie = ctx->priv;
360 if ((ret = movie_common_init(ctx, args, opaque, AVMEDIA_TYPE_AUDIO)) < 0)
363 movie->bps = av_get_bytes_per_sample(movie->codec_ctx->sample_fmt);
367 static int amovie_query_formats(AVFilterContext *ctx)
369 MovieContext *movie = ctx->priv;
370 AVCodecContext *c = movie->codec_ctx;
372 enum AVSampleFormat sample_fmts[] = { c->sample_fmt, -1 };
373 int sample_rates[] = { c->sample_rate, -1 };
374 int64_t chlayouts[] = { c->channel_layout ? c->channel_layout :
375 av_get_default_channel_layout(c->channels), -1 };
377 avfilter_set_common_sample_formats (ctx, avfilter_make_format_list(sample_fmts));
378 ff_set_common_samplerates (ctx, avfilter_make_format_list(sample_rates));
379 ff_set_common_channel_layouts(ctx, avfilter_make_format64_list(chlayouts));
384 static int amovie_config_output_props(AVFilterLink *outlink)
386 MovieContext *movie = outlink->src->priv;
387 AVCodecContext *c = movie->codec_ctx;
389 outlink->sample_rate = c->sample_rate;
390 outlink->time_base = movie->format_ctx->streams[movie->stream_index]->time_base;
395 static int amovie_get_samples(AVFilterLink *outlink)
397 MovieContext *movie = outlink->src->priv;
399 int ret, got_frame = 0;
401 if (!movie->pkt.size && movie->is_done == 1)
404 /* check for another frame, in case the previous one was completely consumed */
405 if (!movie->pkt.size) {
406 while ((ret = av_read_frame(movie->format_ctx, &pkt)) >= 0) {
407 // Is this a packet from the selected stream?
408 if (pkt.stream_index != movie->stream_index) {
409 av_free_packet(&pkt);
412 movie->pkt0 = movie->pkt = pkt;
417 if (ret == AVERROR_EOF) {
423 /* decode and update the movie pkt */
424 avcodec_get_frame_defaults(movie->frame);
425 ret = avcodec_decode_audio4(movie->codec_ctx, movie->frame, &got_frame, &movie->pkt);
430 movie->pkt.data += ret;
431 movie->pkt.size -= ret;
433 /* wrap the decoded data in a samplesref */
435 int nb_samples = movie->frame->nb_samples;
437 av_samples_get_buffer_size(NULL, movie->codec_ctx->channels,
438 nb_samples, movie->codec_ctx->sample_fmt, 1);
442 ff_get_audio_buffer(outlink, AV_PERM_WRITE, nb_samples);
443 memcpy(movie->samplesref->data[0], movie->frame->data[0], data_size);
444 movie->samplesref->pts = movie->pkt.pts;
445 movie->samplesref->pos = movie->pkt.pos;
446 movie->samplesref->audio->sample_rate = movie->codec_ctx->sample_rate;
449 // We got it. Free the packet since we are returning
450 if (movie->pkt.size <= 0)
451 av_free_packet(&movie->pkt0);
456 static int amovie_request_frame(AVFilterLink *outlink)
458 MovieContext *movie = outlink->src->priv;
464 if ((ret = amovie_get_samples(outlink)) < 0)
466 } while (!movie->samplesref);
468 ff_filter_samples(outlink, avfilter_ref_buffer(movie->samplesref, ~0));
469 avfilter_unref_buffer(movie->samplesref);
470 movie->samplesref = NULL;
475 AVFilter avfilter_asrc_amovie = {
477 .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
478 .priv_size = sizeof(MovieContext),
480 .uninit = movie_common_uninit,
481 .query_formats = amovie_query_formats,
483 .inputs = (const AVFilterPad[]) {{ .name = NULL }},
484 .outputs = (const AVFilterPad[]) {{ .name = "default",
485 .type = AVMEDIA_TYPE_AUDIO,
486 .request_frame = amovie_request_frame,
487 .config_props = amovie_config_output_props, },
491 #endif /* CONFIG_AMOVIE_FILTER */