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Code Issues Releases Activity

better pause when displaying audio samples

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Originally committed as revision 1941 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard 2003-06-09 20:48:06 +00:00
parent 7408ad05cc
commit 5e0257e305
1 changed files with 21 additions and 15 deletions
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36
ffplay.c
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@ -94,6 +94,7 @@ typedef struct VideoState {
int show_audio; /* if true, display audio samples */ int show_audio; /* if true, display audio samples */
int16_t sample_array[SAMPLE_ARRAY_SIZE]; int16_t sample_array[SAMPLE_ARRAY_SIZE];
int sample_array_index; int sample_array_index;
int last_i_start;
double video_clock; /* current video clock value */ double video_clock; /* current video clock value */
int video_stream; int video_stream;
@ -128,7 +129,7 @@ static int show_status;
/* current context */ /* current context */
static int is_full_screen; static int is_full_screen;
static VideoState *cur_stream; static VideoState *cur_stream;
static int16_t audio_callback_time; static int64_t audio_callback_time;
#define FF_ALLOC_EVENT (SDL_USEREVENT) #define FF_ALLOC_EVENT (SDL_USEREVENT)
#define FF_REFRESH_EVENT (SDL_USEREVENT + 1) #define FF_REFRESH_EVENT (SDL_USEREVENT + 1)
@ -374,22 +375,27 @@ static void video_audio_display(VideoState *s)
/* compute display index : center on currently output samples */ /* compute display index : center on currently output samples */
channels = s->audio_st->codec.channels; channels = s->audio_st->codec.channels;
nb_display_channels = channels; nb_display_channels = channels;
n = 2 * channels; if (!s->paused) {
delay = audio_write_get_buf_size(s); n = 2 * channels;
delay /= n; delay = audio_write_get_buf_size(s);
delay /= n;
/* to be more precise, we take into account the time spent since
the last buffer computation */ /* to be more precise, we take into account the time spent since
if (audio_callback_time) { the last buffer computation */
time_diff = av_gettime() - audio_callback_time; if (audio_callback_time) {
delay += (time_diff * s->audio_st->codec.sample_rate) / 1000000; time_diff = av_gettime() - audio_callback_time;
delay += (time_diff * s->audio_st->codec.sample_rate) / 1000000;
}
delay -= s->width / 2;
if (delay < s->width)
delay = s->width;
i_start = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
s->last_i_start = i_start;
} else {
i_start = s->last_i_start;
} }
delay -= s->width / 2;
if (delay < s->width)
delay = s->width;
i_start = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00); bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
fill_rectangle(screen, fill_rectangle(screen,
s->xleft, s->ytop, s->width, s->height, s->xleft, s->ytop, s->width, s->height,