avplay.c

        }

        *pkt_temp = *pkt;

        /* if update the audio clock with the pts */
        if (pkt->pts != AV_NOPTS_VALUE) {
            is->audio_clock = av_q2d(is->audio_st->time_base)*pkt->pts;
        }
    }
}

/* prepare a new audio buffer */
static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
{
    VideoState *is = opaque;
    int audio_size, len1;
    double pts;

    audio_callback_time = av_gettime_relative();

    while (len > 0) {
        if (is->audio_buf_index >= is->audio_buf_size) {
           audio_size = audio_decode_frame(is, &pts);
           if (audio_size < 0) {
                /* if error, just output silence */
               is->audio_buf      = is->silence_buf;
               is->audio_buf_size = sizeof(is->silence_buf);
           } else {
               if (is->show_audio)
                   update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
               audio_size = synchronize_audio(is, (int16_t *)is->audio_buf, audio_size,
                                              pts);
               is->audio_buf_size = audio_size;
           }
           is->audio_buf_index = 0;
        }
        len1 = is->audio_buf_size - is->audio_buf_index;
        if (len1 > len)
            len1 = len;
        memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
        len -= len1;
        stream += len1;
        is->audio_buf_index += len1;
    }
}

/* open a given stream. Return 0 if OK */
static int stream_component_open(VideoState *is, int stream_index)
{
    AVFormatContext *ic = is->ic;
    AVCodecContext *avctx;
    AVCodec *codec;
    SDL_AudioSpec wanted_spec, spec;
    AVDictionary *opts;
    AVDictionaryEntry *t = NULL;
    int ret = 0;

    if (stream_index < 0 || stream_index >= ic->nb_streams)
        return -1;
    avctx = ic->streams[stream_index]->codec;

    opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], NULL);

    codec = avcodec_find_decoder(avctx->codec_id);
    avctx->workaround_bugs   = workaround_bugs;
    avctx->idct_algo         = idct;
    avctx->skip_frame        = skip_frame;
    avctx->skip_idct         = skip_idct;
    avctx->skip_loop_filter  = skip_loop_filter;
    avctx->error_concealment = error_concealment;

    if (fast)
        avctx->flags2 |= AV_CODEC_FLAG2_FAST;

    if (!av_dict_get(opts, "threads", NULL, 0))
        av_dict_set(&opts, "threads", "auto", 0);
    if (avctx->codec_type == AVMEDIA_TYPE_VIDEO)
        av_dict_set(&opts, "refcounted_frames", "1", 0);
    if (!codec ||
        (ret = avcodec_open2(avctx, codec, &opts)) < 0) {
        goto fail;
    }
    if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
        av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
        ret =  AVERROR_OPTION_NOT_FOUND;
        goto fail;
    }

    /* prepare audio output */
    if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
        is->sdl_sample_rate = avctx->sample_rate;

        if (!avctx->channel_layout)
            avctx->channel_layout = av_get_default_channel_layout(avctx->channels);
        if (!avctx->channel_layout) {
            fprintf(stderr, "unable to guess channel layout\n");
            ret = AVERROR_INVALIDDATA;
            goto fail;
        }
        if (avctx->channels == 1)
            is->sdl_channel_layout = AV_CH_LAYOUT_MONO;
        else
            is->sdl_channel_layout = AV_CH_LAYOUT_STEREO;
        is->sdl_channels = av_get_channel_layout_nb_channels(is->sdl_channel_layout);

        wanted_spec.format = AUDIO_S16SYS;
        wanted_spec.freq = is->sdl_sample_rate;
        wanted_spec.channels = is->sdl_channels;
        wanted_spec.silence = 0;
        wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
        wanted_spec.callback = sdl_audio_callback;
        wanted_spec.userdata = is;
        if (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
            fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
            ret = AVERROR_UNKNOWN;
            goto fail;
        }
        is->audio_hw_buf_size = spec.size;
        is->sdl_sample_fmt          = AV_SAMPLE_FMT_S16;
        is->resample_sample_fmt     = is->sdl_sample_fmt;
        is->resample_channel_layout = avctx->channel_layout;
        is->resample_sample_rate    = avctx->sample_rate;
    }

    ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
    switch (avctx->codec_type) {
    case AVMEDIA_TYPE_AUDIO:
        is->audio_stream = stream_index;
        is->audio_st = ic->streams[stream_index];
        is->audio_buf_size  = 0;
        is->audio_buf_index = 0;

        /* init averaging filter */
        is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
        is->audio_diff_avg_count = 0;
        /* since we do not have a precise anough audio fifo fullness,
           we correct audio sync only if larger than this threshold */
        is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / avctx->sample_rate;

        memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
        packet_queue_init(&is->audioq);
        SDL_PauseAudio(0);
        break;
    case AVMEDIA_TYPE_VIDEO:
        is->video_stream = stream_index;
        is->video_st = ic->streams[stream_index];

        packet_queue_init(&is->videoq);
        is->video_tid = SDL_CreateThread(video_thread, is);
        break;
    case AVMEDIA_TYPE_SUBTITLE:
        is->subtitle_stream = stream_index;
        is->subtitle_st = ic->streams[stream_index];
        packet_queue_init(&is->subtitleq);

        is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
        break;
    default:
        break;
    }

fail:
    av_dict_free(&opts);

    return ret;
}

static void stream_component_close(VideoState *is, int stream_index)
{
    AVFormatContext *ic = is->ic;
    AVCodecContext *avctx;

    if (stream_index < 0 || stream_index >= ic->nb_streams)
        return;
    avctx = ic->streams[stream_index]->codec;

    switch (avctx->codec_type) {
    case AVMEDIA_TYPE_AUDIO:
        packet_queue_abort(&is->audioq);

        SDL_CloseAudio();

        packet_queue_end(&is->audioq);
        av_packet_unref(&is->audio_pkt);
        if (is->avr)
            avresample_free(&is->avr);
        av_freep(&is->audio_buf1);
        is->audio_buf = NULL;
        av_frame_free(&is->frame);

        if (is->rdft) {
            av_rdft_end(is->rdft);
            av_freep(&is->rdft_data);
            is->rdft = NULL;
            is->rdft_bits = 0;
        }
        break;
    case AVMEDIA_TYPE_VIDEO:
        packet_queue_abort(&is->videoq);

        /* note: we also signal this mutex to make sure we deblock the
           video thread in all cases */
        SDL_LockMutex(is->pictq_mutex);
        SDL_CondSignal(is->pictq_cond);
        SDL_UnlockMutex(is->pictq_mutex);

        SDL_WaitThread(is->video_tid, NULL);

        packet_queue_end(&is->videoq);
        break;
    case AVMEDIA_TYPE_SUBTITLE:
        packet_queue_abort(&is->subtitleq);

        /* note: we also signal this mutex to make sure we deblock the
           video thread in all cases */
        SDL_LockMutex(is->subpq_mutex);
        is->subtitle_stream_changed = 1;

        SDL_CondSignal(is->subpq_cond);
        SDL_UnlockMutex(is->subpq_mutex);

        SDL_WaitThread(is->subtitle_tid, NULL);

        packet_queue_end(&is->subtitleq);
        break;
    default:
        break;
    }

    ic->streams[stream_index]->discard = AVDISCARD_ALL;
    avcodec_close(avctx);
    switch (avctx->codec_type) {
    case AVMEDIA_TYPE_AUDIO:
        is->audio_st = NULL;
        is->audio_stream = -1;
        break;
    case AVMEDIA_TYPE_VIDEO:
        is->video_st = NULL;
        is->video_stream = -1;
        break;
    case AVMEDIA_TYPE_SUBTITLE:
        is->subtitle_st = NULL;
        is->subtitle_stream = -1;
        break;
    default:
        break;
    }
}

/* since we have only one decoding thread, we can use a global
   variable instead of a thread local variable */
static VideoState *global_video_state;

static int decode_interrupt_cb(void *ctx)
{
    return global_video_state && global_video_state->abort_request;
}

/* this thread gets the stream from the disk or the network */
static int decode_thread(void *arg)
{
    VideoState *is = arg;
    AVFormatContext *ic = NULL;
    int err, i, ret;
    int st_index[AVMEDIA_TYPE_NB];
    AVPacket pkt1, *pkt = &pkt1;
    int eof = 0;
    int pkt_in_play_range = 0;
    AVDictionaryEntry *t;
    AVDictionary **opts;
    int orig_nb_streams;

    memset(st_index, -1, sizeof(st_index));
    is->video_stream = -1;
    is->audio_stream = -1;
    is->subtitle_stream = -1;

    global_video_state = is;

    ic = avformat_alloc_context();
    if (!ic) {
        av_log(NULL, AV_LOG_FATAL, "Could not allocate context.\n");
        ret = AVERROR(ENOMEM);
        goto fail;
    }
    ic->interrupt_callback.callback = decode_interrupt_cb;
    err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
    if (err < 0) {
        print_error(is->filename, err);
        ret = -1;
        goto fail;
    }
    if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
        av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
        ret = AVERROR_OPTION_NOT_FOUND;
        goto fail;
    }
    is->ic = ic;

    if (genpts)
        ic->flags |= AVFMT_FLAG_GENPTS;

    opts = setup_find_stream_info_opts(ic, codec_opts);
    orig_nb_streams = ic->nb_streams;

    err = avformat_find_stream_info(ic, opts);

    for (i = 0; i < orig_nb_streams; i++)
        av_dict_free(&opts[i]);
    av_freep(&opts);

    if (err < 0) {
        fprintf(stderr, "%s: could not find codec parameters\n", is->filename);
        ret = -1;
        goto fail;
    }

    if (ic->pb)
        ic->pb->eof_reached = 0; // FIXME hack, avplay maybe should not use url_feof() to test for the end

    if (seek_by_bytes < 0)
        seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT);

    /* if seeking requested, we execute it */
    if (start_time != AV_NOPTS_VALUE) {
        int64_t timestamp;

        timestamp = start_time;
        /* add the stream start time */
        if (ic->start_time != AV_NOPTS_VALUE)
            timestamp += ic->start_time;
        ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
        if (ret < 0) {
            fprintf(stderr, "%s: could not seek to position %0.3f\n",
                    is->filename, (double)timestamp / AV_TIME_BASE);
        }
    }

    for (i = 0; i < ic->nb_streams; i++)
        ic->streams[i]->discard = AVDISCARD_ALL;
    if (!video_disable)
        st_index[AVMEDIA_TYPE_VIDEO] =
            av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
                                wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
    if (!audio_disable)
        st_index[AVMEDIA_TYPE_AUDIO] =
            av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
                                wanted_stream[AVMEDIA_TYPE_AUDIO],
                                st_index[AVMEDIA_TYPE_VIDEO],
                                NULL, 0);
    if (!video_disable)
        st_index[AVMEDIA_TYPE_SUBTITLE] =
            av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
                                wanted_stream[AVMEDIA_TYPE_SUBTITLE],
                                (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
                                 st_index[AVMEDIA_TYPE_AUDIO] :
                                 st_index[AVMEDIA_TYPE_VIDEO]),
                                NULL, 0);
    if (show_status) {
        av_dump_format(ic, 0, is->filename, 0);
    }

    /* open the streams */
    if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
        stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
    }

    ret = -1;
    if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
        ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
    }
    is->refresh_tid = SDL_CreateThread(refresh_thread, is);
    if (ret < 0) {
        if (!display_disable)
            is->show_audio = 2;
    }

    if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
        stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
    }

    if (is->video_stream < 0 && is->audio_stream < 0) {
        fprintf(stderr, "%s: could not open codecs\n", is->filename);
        ret = -1;
        goto fail;
    }

    for (;;) {
        if (is->abort_request)
            break;
        if (is->paused != is->last_paused) {
            is->last_paused = is->paused;
            if (is->paused)
                is->read_pause_return = av_read_pause(ic);
            else
                av_read_play(ic);
        }
#if CONFIG_RTSP_DEMUXER
        if (is->paused && !strcmp(ic->iformat->name, "rtsp")) {
            /* wait 10 ms to avoid trying to get another packet */
            /* XXX: horrible */
            SDL_Delay(10);
            continue;
        }
#endif
        if (is->seek_req) {
            int64_t seek_target = is->seek_pos;
            int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
            int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
// FIXME the +-2 is due to rounding being not done in the correct direction in generation
//      of the seek_pos/seek_rel variables

            ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
            if (ret < 0) {
                fprintf(stderr, "%s: error while seeking\n", is->ic->filename);
            } else {
                if (is->audio_stream >= 0) {
                    packet_queue_flush(&is->audioq);
                    packet_queue_put(&is->audioq, &flush_pkt);
                }
                if (is->subtitle_stream >= 0) {
                    packet_queue_flush(&is->subtitleq);
                    packet_queue_put(&is->subtitleq, &flush_pkt);
                }
                if (is->video_stream >= 0) {
                    packet_queue_flush(&is->videoq);
                    packet_queue_put(&is->videoq, &flush_pkt);
                }
            }
            is->seek_req = 0;
            eof = 0;
        }

        /* if the queue are full, no need to read more */
        if (!infinite_buffer &&
              (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
            || (   (is->audioq   .size  > MIN_AUDIOQ_SIZE || is->audio_stream < 0)
                && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream < 0)
                && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream < 0)))) {
            /* wait 10 ms */
            SDL_Delay(10);
            continue;
        }
        if (eof) {
            if (is->video_stream >= 0) {
                av_init_packet(pkt);
                pkt->data = NULL;
                pkt->size = 0;
                pkt->stream_index = is->video_stream;
                packet_queue_put(&is->videoq, pkt);
            }
            if (is->audio_stream >= 0 &&
                (is->audio_st->codec->codec->capabilities & AV_CODEC_CAP_DELAY)) {
                av_init_packet(pkt);
                pkt->data = NULL;
                pkt->size = 0;
                pkt->stream_index = is->audio_stream;
                packet_queue_put(&is->audioq, pkt);
            }
            SDL_Delay(10);
            if (is->audioq.size + is->videoq.size + is->subtitleq.size == 0) {
                if (loop != 1 && (!loop || --loop)) {
                    stream_seek(cur_stream, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
                } else if (!noautoexit) {
                    ret = AVERROR_EOF;
                    goto fail;
                }
            }
            continue;
        }
        ret = av_read_frame(ic, pkt);
        if (ret < 0) {
            if (ret == AVERROR_EOF || (ic->pb && ic->pb->eof_reached))
                eof = 1;
            if (ic->pb && ic->pb->error)
                break;
            SDL_Delay(100); /* wait for user event */
            continue;
        }
        /* check if packet is in play range specified by user, then queue, otherwise discard */
        pkt_in_play_range = duration == AV_NOPTS_VALUE ||
                (pkt->pts - ic->streams[pkt->stream_index]->start_time) *
                av_q2d(ic->streams[pkt->stream_index]->time_base) -
                (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
                <= ((double)duration / 1000000);
        if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
            packet_queue_put(&is->audioq, pkt);
        } else if (pkt->stream_index == is->video_stream && pkt_in_play_range) {
            packet_queue_put(&is->videoq, pkt);
        } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
            packet_queue_put(&is->subtitleq, pkt);
        } else {
            av_packet_unref(pkt);
        }
    }
    /* wait until the end */
    while (!is->abort_request) {
        SDL_Delay(100);
    }

    ret = 0;
 fail:
    /* disable interrupting */
    global_video_state = NULL;

    /* close each stream */
    if (is->audio_stream >= 0)
        stream_component_close(is, is->audio_stream);
    if (is->video_stream >= 0)
        stream_component_close(is, is->video_stream);
    if (is->subtitle_stream >= 0)
        stream_component_close(is, is->subtitle_stream);
    if (is->ic) {
        avformat_close_input(&is->ic);
    }

    if (ret != 0) {
        SDL_Event event;

        event.type = FF_QUIT_EVENT;
        event.user.data1 = is;
        SDL_PushEvent(&event);
    }
    return 0;
}

static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
{
    VideoState *is;

    is = av_mallocz(sizeof(VideoState));
    if (!is)
        return NULL;
    av_strlcpy(is->filename, filename, sizeof(is->filename));
    is->iformat = iformat;
    is->ytop    = 0;
    is->xleft   = 0;

    /* start video display */
    is->pictq_mutex = SDL_CreateMutex();
    is->pictq_cond  = SDL_CreateCond();

    is->subpq_mutex = SDL_CreateMutex();
    is->subpq_cond  = SDL_CreateCond();

    is->av_sync_type = av_sync_type;
    is->parse_tid    = SDL_CreateThread(decode_thread, is);
    if (!is->parse_tid) {
        av_free(is);
        return NULL;
    }
    return is;
}

static void stream_cycle_channel(VideoState *is, int codec_type)
{
    AVFormatContext *ic = is->ic;
    int start_index, stream_index;
    AVStream *st;

    if (codec_type == AVMEDIA_TYPE_VIDEO)
        start_index = is->video_stream;
    else if (codec_type == AVMEDIA_TYPE_AUDIO)
        start_index = is->audio_stream;
    else
        start_index = is->subtitle_stream;
    if (start_index < (codec_type == AVMEDIA_TYPE_SUBTITLE ? -1 : 0))
        return;
    stream_index = start_index;
    for (;;) {
        if (++stream_index >= is->ic->nb_streams)
        {
            if (codec_type == AVMEDIA_TYPE_SUBTITLE)
            {
                stream_index = -1;
                goto the_end;
            } else
                stream_index = 0;
        }
        if (stream_index == start_index)
            return;
        st = ic->streams[stream_index];
        if (st->codec->codec_type == codec_type) {
            /* check that parameters are OK */
            switch (codec_type) {
            case AVMEDIA_TYPE_AUDIO:
                if (st->codec->sample_rate != 0 &&
                    st->codec->channels != 0)
                    goto the_end;
                break;
            case AVMEDIA_TYPE_VIDEO:
            case AVMEDIA_TYPE_SUBTITLE:
                goto the_end;
            default:
                break;
            }
        }
    }
 the_end:
    stream_component_close(is, start_index);
    stream_component_open(is, stream_index);
}


static void toggle_full_screen(void)
{
#if defined(__APPLE__) && SDL_VERSION_ATLEAST(1, 2, 14)
    /* OS X needs to empty the picture_queue */
    int i;
    for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++)
        cur_stream->pictq[i].reallocate = 1;
#endif
    is_full_screen = !is_full_screen;
    video_open(cur_stream);
}

static void toggle_pause(void)
{
    if (cur_stream)
        stream_pause(cur_stream);
    step = 0;
}

static void step_to_next_frame(void)
{
    if (cur_stream) {
        /* if the stream is paused unpause it, then step */
        if (cur_stream->paused)
            stream_pause(cur_stream);
    }
    step = 1;
}

static void toggle_audio_display(void)
{
    if (cur_stream) {
        int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
        cur_stream->show_audio = (cur_stream->show_audio + 1) % 3;
        fill_rectangle(screen,
                       cur_stream->xleft, cur_stream->ytop, cur_stream->width, cur_stream->height,
                       bgcolor);
        SDL_UpdateRect(screen, cur_stream->xleft, cur_stream->ytop, cur_stream->width, cur_stream->height);
    }
}

static void seek_chapter(VideoState *is, int incr)
{
    int64_t pos = get_master_clock(is) * AV_TIME_BASE;
    int i;

    if (!is->ic->nb_chapters)
        return;

    /* find the current chapter */
    for (i = 0; i < is->ic->nb_chapters; i++) {
        AVChapter *ch = is->ic->chapters[i];
        if (av_compare_ts(pos, AV_TIME_BASE_Q, ch->start, ch->time_base) < 0) {
            i--;
            break;
        }
    }

    i += incr;
    i = FFMAX(i, 0);
    if (i >= is->ic->nb_chapters)
        return;

    av_log(NULL, AV_LOG_VERBOSE, "Seeking to chapter %d.\n", i);
    stream_seek(is, av_rescale_q(is->ic->chapters[i]->start, is->ic->chapters[i]->time_base,
                                 AV_TIME_BASE_Q), 0, 0);
}

/* handle an event sent by the GUI */
static void event_loop(void)
{
    SDL_Event event;
    double incr, pos, frac;

    for (;;) {
        double x;
        SDL_WaitEvent(&event);
        switch (event.type) {
        case SDL_KEYDOWN:
            if (exit_on_keydown) {
                do_exit();
                break;
            }
            switch (event.key.keysym.sym) {
            case SDLK_ESCAPE:
            case SDLK_q:
                do_exit();
                break;
            case SDLK_f:
                toggle_full_screen();
                break;
            case SDLK_p:
            case SDLK_SPACE:
                toggle_pause();
                break;
            case SDLK_s: // S: Step to next frame
                step_to_next_frame();
                break;
            case SDLK_a:
                if (cur_stream)
                    stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
                break;
            case SDLK_v:
                if (cur_stream)
                    stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
                break;
            case SDLK_t:
                if (cur_stream)
                    stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
                break;
            case SDLK_w:
                toggle_audio_display();
                break;
            case SDLK_PAGEUP:
                seek_chapter(cur_stream, 1);
                break;
            case SDLK_PAGEDOWN:
                seek_chapter(cur_stream, -1);
                break;
            case SDLK_LEFT:
                incr = -10.0;
                goto do_seek;
            case SDLK_RIGHT:
                incr = 10.0;
                goto do_seek;
            case SDLK_UP:
                incr = 60.0;
                goto do_seek;
            case SDLK_DOWN:
                incr = -60.0;
            do_seek:
                if (cur_stream) {
                    if (seek_by_bytes) {
                        if (cur_stream->video_stream >= 0 && cur_stream->video_current_pos >= 0) {
                            pos = cur_stream->video_current_pos;
                        } else if (cur_stream->audio_stream >= 0 && cur_stream->audio_pkt.pos >= 0) {
                            pos = cur_stream->audio_pkt.pos;
                        } else
                            pos = avio_tell(cur_stream->ic->pb);
                        if (cur_stream->ic->bit_rate)
                            incr *= cur_stream->ic->bit_rate / 8.0;
                        else
                            incr *= 180000.0;
                        pos += incr;
                        stream_seek(cur_stream, pos, incr, 1);
                    } else {
                        pos = get_master_clock(cur_stream);
                        pos += incr;
                        stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
                    }
                }
                break;
            default:
                break;
            }
            break;
        case SDL_MOUSEBUTTONDOWN:
            if (exit_on_mousedown) {
                do_exit();
                break;
            }
        case SDL_MOUSEMOTION:
            if (event.type == SDL_MOUSEBUTTONDOWN) {
                x = event.button.x;
            } else {
                if (event.motion.state != SDL_PRESSED)
                    break;
                x = event.motion.x;
            }
            if (cur_stream) {
                if (seek_by_bytes || cur_stream->ic->duration <= 0) {
                    uint64_t size =  avio_size(cur_stream->ic->pb);
                    stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
                } else {
                    int64_t ts;
                    int ns, hh, mm, ss;
                    int tns, thh, tmm, tss;
                    tns  = cur_stream->ic->duration / 1000000LL;
                    thh  = tns / 3600;
                    tmm  = (tns % 3600) / 60;
                    tss  = (tns % 60);
                    frac = x / cur_stream->width;
                    ns   = frac * tns;
                    hh   = ns / 3600;
                    mm   = (ns % 3600) / 60;
                    ss   = (ns % 60);
                    fprintf(stderr, "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
                            hh, mm, ss, thh, tmm, tss);
                    ts = frac * cur_stream->ic->duration;
                    if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
                        ts += cur_stream->ic->start_time;
                    stream_seek(cur_stream, ts, 0, 0);
                }
            }
            break;
        case SDL_VIDEORESIZE:
            if (cur_stream) {
                screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 0,
                                          SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
                screen_width  = cur_stream->width  = event.resize.w;
                screen_height = cur_stream->height = event.resize.h;
            }
            break;
        case SDL_QUIT:
        case FF_QUIT_EVENT:
            do_exit();
            break;
        case FF_ALLOC_EVENT:
            video_open(event.user.data1);
            alloc_picture(event.user.data1);
            break;
        case FF_REFRESH_EVENT:
            video_refresh_timer(event.user.data1);
            cur_stream->refresh = 0;
            break;
        default:
            break;
        }
    }
}

static int opt_frame_size(void *optctx, const char *opt, const char *arg)
{
    av_log(NULL, AV_LOG_ERROR,
           "Option '%s' has been removed, use private format options instead\n", opt);
    return AVERROR(EINVAL);
}

static int opt_width(void *optctx, const char *opt, const char *arg)
{
    screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
    return 0;
}

static int opt_height(void *optctx, const char *opt, const char *arg)
{
    screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
    return 0;
}

static int opt_format(void *optctx, const char *opt, const char *arg)
{
    file_iformat = av_find_input_format(arg);
    if (!file_iformat) {
        fprintf(stderr, "Unknown input format: %s\n", arg);
        return AVERROR(EINVAL);
    }
    return 0;
}

static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
{
    av_log(NULL, AV_LOG_ERROR,
           "Option '%s' has been removed, use private format options instead\n", opt);
    return AVERROR(EINVAL);
}

static int opt_sync(void *optctx, const char *opt, const char *arg)
{
    if (!strcmp(arg, "audio"))
        av_sync_type = AV_SYNC_AUDIO_MASTER;
    else if (!strcmp(arg, "video"))
        av_sync_type = AV_SYNC_VIDEO_MASTER;
    else if (!strcmp(arg, "ext"))
        av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
    else {
        fprintf(stderr, "Unknown value for %s: %s\n", opt, arg);
        exit(1);
    }
    return 0;
}

static int opt_seek(void *optctx, const char *opt, const char *arg)
{
    start_time = parse_time_or_die(opt, arg, 1);
    return 0;
}

static int opt_duration(void *optctx, const char *opt, const char *arg)
{
    duration = parse_time_or_die(opt, arg, 1);
    return 0;
}

static const OptionDef options[] = {
#include "cmdutils_common_opts.h"
    { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
    { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
    { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
    { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
    { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
    { "vn", OPT_BOOL, { &video_disable }, "disable video" },
    { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_number" },
    { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_number" },
    { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_number" },
    { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
    { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
    { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
    { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
    { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
    { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
    { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
    { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, { &workaround_bugs }, "workaround bugs", "" },
    { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
    { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
    { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
    { "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_loop_filter }, "", "" },
    { "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_frame }, "", "" },
    { "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_idct }, "", "" },
    { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, { &idct }, "set idct algo",  "algo" },
    { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { &error_concealment }, "set error concealment options",  "bit_mask" },
    { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
    { "noautoexit", OPT_BOOL | OPT_EXPERT, { &noautoexit }, "Do not exit at the end of playback", "" },
    { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
    { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
    { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
    { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
    { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
    { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
#if CONFIG_AVFILTER
    { "vf", OPT_STRING | HAS_ARG, { &vfilters }, "video filters", "filter list" },
#endif
    { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
    { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { opt_default }, "generic catch all option", "" },
    { "i", 0, { NULL }, "avconv compatibility dummy option", ""},
    { "autorotate", OPT_BOOL, { &autorotate }, "automatically rotate video", "" },
    { NULL, },
};

static void show_usage(void)
{
    printf("Simple media player\n");
    printf("usage: %s [options] input_file\n", program_name);
    printf("\n");
}

void show_help_default(const char *opt, const char *arg)
{
    av_log_set_callback(log_callback_help);
    show_usage();
    show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
    show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
    printf("\n");
    show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
    show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
#if !CONFIG_AVFILTER
    show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
#endif
    printf("\nWhile playing:\n"
           "q, ESC              quit\n"
           "f                   toggle full screen\n"
           "p, SPC              pause\n"
           "a                   cycle audio channel\n"
           "v                   cycle video channel\n"
           "t                   cycle subtitle channel\n"
           "w                   show audio waves\n"
           "s                   activate frame-step mode\n"
           "left/right          seek backward/forward 10 seconds\n"
           "down/up             seek backward/forward 1 minute\n"
           "mouse click         seek to percentage in file corresponding to fraction of width\n"
           );
}

static void opt_input_file(void *optctx, const char *filename)
{
    if (input_filename) {
        fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
                filename, input_filename);
        exit(1);
    }
    if (!strcmp(filename, "-"))
        filename = "pipe:";
    input_filename = filename;
}

/* Called from the main */
int main(int argc, char **argv)
{
    int flags;

    av_log_set_flags(AV_LOG_SKIP_REPEATED);
    parse_loglevel(argc, argv, options);

    /* register all codecs, demux and protocols */
    avcodec_register_all();
#if CONFIG_AVDEVICE
    avdevice_register_all();
#endif
#if CONFIG_AVFILTER
    avfilter_register_all();
#endif
    av_register_all();
    avformat_network_init();

    init_opts();