plm_seek_frame()

plm_frame_t * fl::third_party::plm_seek_frame	(	plm_t *	self,
		double	time,
		int	seek_exact )

Definition at line 617 of file pl_mpeg.hpp.

                                                                                  {
    if (!plm_init_decoders(self)) {
        return NULL;
    }
 
    if (!self->video_packet_type) {
        return NULL;
    }
 
    int type = self->video_packet_type;
 
    double start_time = plm_demux_get_start_time(self->demux, type);
    double duration = plm_demux_get_duration(self->demux, type);
 
    if (time < 0) {
        time = 0;
    }
    else if (time > duration) {
        time = duration;
    }
    
    plm_packet_t *packet = plm_demux_seek(self->demux, time, type, TRUE);
    if (!packet) {
        return NULL;
    }
 
    // Disable writing to the audio buffer while decoding video
    int previous_audio_packet_type = self->audio_packet_type;
    self->audio_packet_type = 0;
 
    // Clear video buffer and decode the found packet
    plm_video_rewind(self->video_decoder);
    plm_video_set_time(self->video_decoder, packet->pts - start_time);
    plm_buffer_write(self->video_buffer, packet->data, packet->length);
    plm_frame_t *frame = plm_video_decode(self->video_decoder); 
 
    // If we want to seek to an exact frame, we have to decode all frames
    // on top of the intra frame we just jumped to.
    if (seek_exact) {
        while (frame && frame->time < time) {
            frame = plm_video_decode(self->video_decoder);
        }
    }
 
    // Enable writing to the audio buffer again?
    self->audio_packet_type = previous_audio_packet_type;
 
    if (frame) {
        self->time = frame->time;
    }
 
    self->has_ended = FALSE;
    return frame;
}

References fl::third_party::plm_packet_t::data, FALSE, FL_NOEXCEPT, fl::third_party::plm_packet_t::length, NULL, plm_buffer_write(), plm_demux_get_duration(), plm_demux_get_start_time(), plm_demux_seek(), plm_init_decoders(), plm_video_decode(), plm_video_rewind(), plm_video_set_time(), fl::third_party::plm_packet_t::pts, fl::third_party::plm_frame_t::time, fl::time(), and TRUE.

Referenced by plm_seek().

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