621 lines
16 KiB
C
621 lines
16 KiB
C
/*
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* Copyright (c) 2015 John R. Bradley <jrb@turrettech.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "ff-demuxer.h"
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#include <libavutil/avstring.h>
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#include <libavutil/time.h>
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#include <libavdevice/avdevice.h>
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#include <libavfilter/avfilter.h>
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#include <assert.h>
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#include "ff-compat.h"
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#define DEFAULT_AV_SYNC_TYPE AV_SYNC_VIDEO_MASTER
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#define AUDIO_FRAME_QUEUE_SIZE 1
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#define VIDEO_FRAME_QUEUE_SIZE 1
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#define AUDIO_PACKET_QUEUE_SIZE (5 * 16 * 1024)
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#define VIDEO_PACKET_QUEUE_SIZE (5 * 256 * 1024)
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static void *demux_thread(void *opaque_demuxer);
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struct ff_demuxer *ff_demuxer_init()
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{
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struct ff_demuxer *demuxer;
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av_register_all();
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avdevice_register_all();
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avfilter_register_all();
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avformat_network_init();
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demuxer = av_mallocz(sizeof(struct ff_demuxer));
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if (demuxer == NULL)
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return NULL;
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demuxer->clock.sync_type = DEFAULT_AV_SYNC_TYPE;
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demuxer->options.frame_drop = AVDISCARD_DEFAULT;
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demuxer->options.audio_frame_queue_size = AUDIO_FRAME_QUEUE_SIZE;
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demuxer->options.video_frame_queue_size = VIDEO_FRAME_QUEUE_SIZE;
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demuxer->options.audio_packet_queue_size = AUDIO_PACKET_QUEUE_SIZE;
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demuxer->options.video_packet_queue_size = VIDEO_PACKET_QUEUE_SIZE;
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demuxer->options.is_hw_decoding = false;
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return demuxer;
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}
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bool ff_demuxer_open(struct ff_demuxer *demuxer, char *input,
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char *input_format)
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{
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int ret;
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demuxer->input = av_strdup(input);
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if (input_format != NULL)
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demuxer->input_format = av_strdup(input_format);
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ret = pthread_create(&demuxer->demuxer_thread, NULL, demux_thread,
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demuxer);
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return ret == 0;
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}
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void ff_demuxer_free(struct ff_demuxer *demuxer)
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{
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void *demuxer_thread_result;
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demuxer->abort = true;
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pthread_join(demuxer->demuxer_thread, &demuxer_thread_result);
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if (demuxer->input != NULL)
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av_free(demuxer->input);
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if (demuxer->input_format != NULL)
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av_free(demuxer->input_format);
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if (demuxer->audio_decoder != NULL)
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ff_decoder_free(demuxer->audio_decoder);
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if (demuxer->video_decoder != NULL)
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ff_decoder_free(demuxer->video_decoder);
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if (demuxer->format_context)
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avformat_close_input(&demuxer->format_context);
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av_free(demuxer);
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}
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void ff_demuxer_set_callbacks(struct ff_callbacks *callbacks,
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ff_callback_frame frame,
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ff_callback_format format,
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ff_callback_initialize initialize,
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ff_callback_frame frame_initialize,
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ff_callback_frame frame_free,
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void *opaque)
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{
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callbacks->opaque = opaque;
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callbacks->frame = frame;
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callbacks->format = format;
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callbacks->initialize = initialize;
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callbacks->frame_initialize = frame_initialize;
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callbacks->frame_free = frame_free;
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}
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static int demuxer_interrupted_callback(void *opaque)
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{
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return opaque != NULL && ((struct ff_demuxer *)opaque)->abort;
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}
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static double ff_external_clock(void *opaque)
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{
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(void)opaque;
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return av_gettime() / 1000000.0;
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}
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static bool set_clock_sync_type(struct ff_demuxer *demuxer)
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{
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if (demuxer->video_decoder == NULL) {
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if (demuxer->clock.sync_type == AV_SYNC_VIDEO_MASTER)
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demuxer->clock.sync_type = AV_SYNC_AUDIO_MASTER;
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}
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if (demuxer->audio_decoder == NULL) {
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if (demuxer->clock.sync_type == AV_SYNC_AUDIO_MASTER)
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demuxer->clock.sync_type = AV_SYNC_VIDEO_MASTER;
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}
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switch (demuxer->clock.sync_type) {
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case AV_SYNC_AUDIO_MASTER:
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demuxer->clock.sync_clock = ff_decoder_clock;
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demuxer->clock.opaque = demuxer->audio_decoder;
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break;
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case AV_SYNC_VIDEO_MASTER:
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demuxer->clock.sync_clock = ff_decoder_clock;
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demuxer->clock.opaque = demuxer->video_decoder;
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break;
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case AV_SYNC_EXTERNAL_MASTER:
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demuxer->clock.sync_clock = ff_external_clock;
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demuxer->clock.opaque = NULL;
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break;
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default:
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return false;
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}
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return true;
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}
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AVHWAccel *find_hwaccel_codec(AVCodecContext *codec_context)
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{
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AVHWAccel *hwaccel = NULL;
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while ((hwaccel = av_hwaccel_next(hwaccel)) != NULL) {
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if (hwaccel->id == codec_context->codec_id &&
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(hwaccel->pix_fmt == AV_PIX_FMT_VDA_VLD ||
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hwaccel->pix_fmt == AV_PIX_FMT_DXVA2_VLD ||
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hwaccel->pix_fmt == AV_PIX_FMT_VAAPI_VLD)) {
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return hwaccel;
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}
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}
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return NULL;
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}
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enum AVPixelFormat get_hwaccel_format(struct AVCodecContext *s,
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const enum AVPixelFormat * fmt)
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{
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(void)s;
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(void)fmt;
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// for now force output to common denominator
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return AV_PIX_FMT_YUV420P;
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}
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static bool initialize_decoder(struct ff_demuxer *demuxer,
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AVCodecContext *codec_context, AVStream *stream,
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bool hwaccel_decoder)
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{
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switch (codec_context->codec_type) {
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case AVMEDIA_TYPE_AUDIO:
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demuxer->audio_decoder = ff_decoder_init(
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codec_context, stream,
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demuxer->options.audio_packet_queue_size,
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demuxer->options.audio_frame_queue_size);
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demuxer->audio_decoder->hwaccel_decoder = hwaccel_decoder;
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demuxer->audio_decoder->frame_drop =
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demuxer->options.frame_drop;
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demuxer->audio_decoder->natural_sync_clock =
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AV_SYNC_AUDIO_MASTER;
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demuxer->audio_decoder->callbacks = &demuxer->audio_callbacks;
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if (!ff_callbacks_format(&demuxer->audio_callbacks,
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codec_context)) {
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ff_decoder_free(demuxer->audio_decoder);
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demuxer->audio_decoder = NULL;
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return false;
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}
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demuxer->audio_decoder = demuxer->audio_decoder;
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return true;
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case AVMEDIA_TYPE_VIDEO:
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demuxer->video_decoder = ff_decoder_init(
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codec_context, stream,
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demuxer->options.video_packet_queue_size,
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demuxer->options.video_frame_queue_size);
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demuxer->video_decoder->hwaccel_decoder = hwaccel_decoder;
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demuxer->video_decoder->frame_drop =
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demuxer->options.frame_drop;
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demuxer->video_decoder->natural_sync_clock =
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AV_SYNC_VIDEO_MASTER;
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demuxer->video_decoder->callbacks = &demuxer->video_callbacks;
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if (!ff_callbacks_format(&demuxer->video_callbacks,
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codec_context)) {
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ff_decoder_free(demuxer->video_decoder);
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demuxer->video_decoder = NULL;
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return false;
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}
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return true;
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default:
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return false;
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}
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}
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typedef enum AVPixelFormat (*AVGetFormatCb)(
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struct AVCodecContext *s, const enum AVPixelFormat * fmt);
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static bool find_decoder(struct ff_demuxer *demuxer, AVStream *stream)
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{
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AVCodecContext *codec_context = NULL;
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AVCodec *codec = NULL;
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AVDictionary *options_dict = NULL;
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int ret;
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bool hwaccel_decoder = false;
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codec_context = stream->codec;
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// enable reference counted frames since we may have a buffer size
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// > 1
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codec_context->refcounted_frames = 1;
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// png/tiff decoders have serious issues with multiple threads
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if (codec_context->codec_id == AV_CODEC_ID_PNG
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|| codec_context->codec_id == AV_CODEC_ID_TIFF
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|| codec_context->codec_id == AV_CODEC_ID_JPEG2000
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|| codec_context->codec_id == AV_CODEC_ID_WEBP)
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codec_context->thread_count = 1;
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if (demuxer->options.is_hw_decoding) {
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AVHWAccel *hwaccel = find_hwaccel_codec(codec_context);
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if (hwaccel) {
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AVCodec *codec_vda =
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avcodec_find_decoder_by_name(hwaccel->name);
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if (codec_vda != NULL) {
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AVGetFormatCb original_get_format =
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codec_context->get_format;
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codec_context->get_format = get_hwaccel_format;
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codec_context->opaque = hwaccel;
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ret = avcodec_open2(codec_context, codec_vda,
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&options_dict);
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if (ret < 0) {
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av_log(NULL, AV_LOG_WARNING,
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"no hardware decoder found for"
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" codec with id %d",
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codec_context->codec_id);
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codec_context->get_format =
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original_get_format;
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codec_context->opaque = NULL;
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} else {
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codec = codec_vda;
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hwaccel_decoder = true;
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}
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}
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}
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}
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if (codec == NULL) {
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codec = avcodec_find_decoder(codec_context->codec_id);
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if (codec == NULL) {
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av_log(NULL, AV_LOG_WARNING, "no decoder found for"
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" codec with id %d",
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codec_context->codec_id);
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return false;
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}
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if (avcodec_open2(codec_context, codec, &options_dict) < 0) {
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av_log(NULL, AV_LOG_WARNING, "unable to open decoder"
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" with codec id %d",
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codec_context->codec_id);
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return false;
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}
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}
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return initialize_decoder(demuxer, codec_context, stream,
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hwaccel_decoder);
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}
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void ff_demuxer_flush(struct ff_demuxer *demuxer)
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{
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if (demuxer->video_decoder != NULL &&
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demuxer->video_decoder->stream != NULL) {
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packet_queue_flush(&demuxer->video_decoder->packet_queue);
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packet_queue_put_flush_packet(
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&demuxer->video_decoder->packet_queue);
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}
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if (demuxer->audio_decoder != NULL &&
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demuxer->audio_decoder->stream != NULL) {
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packet_queue_flush(&demuxer->audio_decoder->packet_queue);
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packet_queue_put_flush_packet(
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&demuxer->audio_decoder->packet_queue);
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}
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}
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void ff_demuxer_reset(struct ff_demuxer *demuxer)
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{
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struct ff_packet packet = {0};
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struct ff_clock *clock = ff_clock_init();
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clock->sync_type = demuxer->clock.sync_type;
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clock->sync_clock = demuxer->clock.sync_clock;
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clock->opaque = demuxer->clock.opaque;
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packet.clock = clock;
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if (demuxer->audio_decoder != NULL) {
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ff_clock_retain(clock);
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packet_queue_put(&demuxer->audio_decoder->packet_queue,
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&packet);
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}
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if (demuxer->video_decoder != NULL) {
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ff_clock_retain(clock);
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packet_queue_put(&demuxer->video_decoder->packet_queue,
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&packet);
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}
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}
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static bool open_input(struct ff_demuxer *demuxer,
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AVFormatContext **format_context)
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{
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AVInputFormat *input_format = NULL;
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AVIOInterruptCB interrupted_callback;
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interrupted_callback.callback = demuxer_interrupted_callback;
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interrupted_callback.opaque = demuxer;
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*format_context = avformat_alloc_context();
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(*format_context)->interrupt_callback = interrupted_callback;
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if (demuxer->input_format != NULL) {
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input_format = av_find_input_format(demuxer->input_format);
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if (input_format == NULL)
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av_log(NULL, AV_LOG_WARNING, "unable to find input "
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"format %s",
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demuxer->input_format);
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}
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if (avformat_open_input(format_context, demuxer->input,
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input_format, NULL) != 0)
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return false;
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return avformat_find_stream_info(*format_context, NULL) >= 0;
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}
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static inline void set_decoder_start_time(struct ff_decoder *decoder,
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int64_t start_time)
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{
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if (decoder)
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decoder->start_pts = av_rescale_q(start_time, AV_TIME_BASE_Q,
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decoder->stream->time_base);
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}
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static bool find_and_initialize_stream_decoders(struct ff_demuxer *demuxer)
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{
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AVFormatContext *format_context = demuxer->format_context;
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unsigned int i;
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AVStream *audio_stream = NULL;
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AVStream *video_stream = NULL;
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int64_t start_time = INT64_MAX;
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for (i = 0; i < format_context->nb_streams; i++) {
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AVCodecContext *codec = format_context->streams[i]->codec;
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if (codec->codec_type == AVMEDIA_TYPE_VIDEO && !video_stream)
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video_stream = format_context->streams[i];
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if (codec->codec_type == AVMEDIA_TYPE_AUDIO && !audio_stream)
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audio_stream = format_context->streams[i];
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}
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int default_stream_index = av_find_default_stream_index(
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demuxer->format_context);
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if (default_stream_index >= 0) {
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AVStream *stream =
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format_context->streams[default_stream_index];
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if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO)
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demuxer->clock.sync_type = AV_SYNC_AUDIO_MASTER;
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else if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO)
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demuxer->clock.sync_type = AV_SYNC_VIDEO_MASTER;
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}
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if (video_stream != NULL)
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find_decoder(demuxer, video_stream);
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if (audio_stream != NULL)
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find_decoder(demuxer, audio_stream);
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if (demuxer->video_decoder == NULL && demuxer->audio_decoder == NULL) {
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return false;
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}
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if (!set_clock_sync_type(demuxer)) {
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return false;
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}
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for (i = 0; i < format_context->nb_streams; i++) {
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AVStream *st = format_context->streams[i];
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int64_t st_start_time;
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if (st->discard == AVDISCARD_ALL ||
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st->start_time == AV_NOPTS_VALUE) {
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continue;
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}
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st_start_time = av_rescale_q(st->start_time, st->time_base,
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AV_TIME_BASE_Q);
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start_time = FFMIN(start_time, st_start_time);
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}
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if (format_context->start_time != AV_NOPTS_VALUE) {
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if (start_time > format_context->start_time ||
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start_time == INT64_MAX) {
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start_time = format_context->start_time;
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}
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}
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if (start_time != INT64_MAX) {
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set_decoder_start_time(demuxer->video_decoder, start_time);
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set_decoder_start_time(demuxer->audio_decoder, start_time);
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}
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if (demuxer->audio_decoder != NULL) {
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if (ff_callbacks_initialize(&demuxer->audio_callbacks)) {
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ff_decoder_start(demuxer->audio_decoder);
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} else {
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ff_decoder_free(demuxer->audio_decoder);
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demuxer->audio_decoder = NULL;
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if (!set_clock_sync_type(demuxer))
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return false;
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}
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}
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if (demuxer->video_decoder != NULL) {
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if (ff_callbacks_initialize(&demuxer->video_callbacks)) {
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ff_decoder_start(demuxer->video_decoder);
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} else {
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ff_decoder_free(demuxer->video_decoder);
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demuxer->video_decoder = NULL;
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if (!set_clock_sync_type(demuxer))
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return false;
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}
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}
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return set_clock_sync_type(demuxer);
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}
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static bool handle_seek(struct ff_demuxer *demuxer)
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{
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int ret;
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if (demuxer->seek_request) {
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AVStream *seek_stream = NULL;
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int64_t seek_target = demuxer->seek_pos;
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if (demuxer->video_decoder != NULL) {
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seek_stream = demuxer->video_decoder->stream;
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} else if (demuxer->audio_decoder != NULL) {
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seek_stream = demuxer->audio_decoder->stream;
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}
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if (seek_stream != NULL && demuxer->format_context->duration != AV_NOPTS_VALUE) {
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seek_target = av_rescale_q(seek_target,
|
|
AV_TIME_BASE_Q,
|
|
seek_stream->time_base);
|
|
}
|
|
|
|
ret = av_seek_frame(demuxer->format_context,
|
|
0, seek_target,
|
|
demuxer->seek_flags);
|
|
if (ret < 0) {
|
|
av_log(NULL, AV_LOG_ERROR, "unable to seek stream: %s",
|
|
av_err2str(ret));
|
|
demuxer->seek_pos = 0;
|
|
demuxer->seek_request = false;
|
|
return false;
|
|
|
|
} else {
|
|
if (demuxer->seek_flush)
|
|
ff_demuxer_flush(demuxer);
|
|
ff_demuxer_reset(demuxer);
|
|
}
|
|
|
|
demuxer->seek_request = false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void seek_beginning(struct ff_demuxer *demuxer)
|
|
{
|
|
if (demuxer->format_context->duration == AV_NOPTS_VALUE) {
|
|
demuxer->seek_flags = AVSEEK_FLAG_FRAME;
|
|
demuxer->seek_pos = 0;
|
|
} else {
|
|
demuxer->seek_flags = AVSEEK_FLAG_BACKWARD;
|
|
demuxer->seek_pos = demuxer->format_context->start_time;
|
|
}
|
|
demuxer->seek_request = true;
|
|
demuxer->seek_flush = false;
|
|
av_log(NULL, AV_LOG_VERBOSE, "looping media %s", demuxer->input);
|
|
}
|
|
|
|
static void *demux_thread(void *opaque)
|
|
{
|
|
struct ff_demuxer *demuxer = (struct ff_demuxer *) opaque;
|
|
int result;
|
|
|
|
struct ff_packet packet = {0};
|
|
|
|
if (!open_input(demuxer, &demuxer->format_context))
|
|
goto fail;
|
|
|
|
av_dump_format(demuxer->format_context, 0, demuxer->input, 0);
|
|
|
|
if (!find_and_initialize_stream_decoders(demuxer))
|
|
goto fail;
|
|
|
|
ff_demuxer_reset(demuxer);
|
|
|
|
while (!demuxer->abort) {
|
|
// failed to seek (looping?)
|
|
if (!handle_seek(demuxer))
|
|
break;
|
|
|
|
if (ff_decoder_full(demuxer->audio_decoder) ||
|
|
ff_decoder_full(demuxer->video_decoder)) {
|
|
av_usleep(10 * 1000); // 10ms
|
|
continue;
|
|
}
|
|
|
|
result = av_read_frame(demuxer->format_context, &packet.base);
|
|
if (result < 0) {
|
|
bool eof = false;
|
|
if (result == AVERROR_EOF) {
|
|
eof = true;
|
|
} else if (demuxer->format_context->pb != NULL) {
|
|
AVIOContext *io_context =
|
|
demuxer->format_context->pb;
|
|
if (io_context->error == 0) {
|
|
av_usleep(100 * 1000); // 100ms
|
|
continue;
|
|
} else {
|
|
if (io_context->eof_reached != 0)
|
|
eof = true;
|
|
}
|
|
}
|
|
|
|
if (eof) {
|
|
if (demuxer->options.is_looping) {
|
|
seek_beginning(demuxer);
|
|
} else {
|
|
break;
|
|
}
|
|
continue;
|
|
} else {
|
|
av_log(NULL, AV_LOG_ERROR,
|
|
"av_read_frame() failed: %s",
|
|
av_err2str(result));
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ff_decoder_accept(demuxer->video_decoder, &packet))
|
|
continue;
|
|
else if (ff_decoder_accept(demuxer->audio_decoder, &packet))
|
|
continue;
|
|
else
|
|
av_free_packet(&packet.base);
|
|
}
|
|
if (demuxer->audio_decoder != NULL)
|
|
demuxer->audio_decoder->eof = true;
|
|
if (demuxer->video_decoder != NULL)
|
|
demuxer->video_decoder->eof = true;
|
|
fail:
|
|
demuxer->abort = true;
|
|
|
|
return NULL;
|
|
}
|