avplay.c 97.8 KB
Newer Older
Fabrice Bellard's avatar
Fabrice Bellard committed
1
/*
Anton Khirnov's avatar
Anton Khirnov committed
2
 * avplay : Simple Media Player based on the Libav libraries
Fabrice Bellard's avatar
Fabrice Bellard committed
3 4
 * Copyright (c) 2003 Fabrice Bellard
 *
5
 * This file is part of Libav.
6
 *
7
 * Libav is free software; you can redistribute it and/or
Fabrice Bellard's avatar
Fabrice Bellard committed
8 9
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
Fabrice Bellard's avatar
Fabrice Bellard committed
11
 *
12
 * Libav is distributed in the hope that it will be useful,
Fabrice Bellard's avatar
Fabrice Bellard committed
13 14 15 16 17
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with Libav; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Fabrice Bellard's avatar
Fabrice Bellard committed
20
 */
21

22
#include "config.h"
23
#include <inttypes.h>
24 25
#include <math.h>
#include <limits.h>
26
#include "libavutil/avstring.h"
27
#include "libavutil/colorspace.h"
28
#include "libavutil/mathematics.h"
29
#include "libavutil/pixdesc.h"
30
#include "libavutil/imgutils.h"
31
#include "libavutil/dict.h"
32 33
#include "libavutil/parseutils.h"
#include "libavutil/samplefmt.h"
34
#include "libavutil/time.h"
35 36 37
#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
38
#include "libavresample/avresample.h"
39
#include "libavutil/opt.h"
40
#include "libavcodec/avfft.h"
Fabrice Bellard's avatar
Fabrice Bellard committed
41

42 43 44
#if CONFIG_AVFILTER
# include "libavfilter/avfilter.h"
# include "libavfilter/avfiltergraph.h"
45
# include "libavfilter/buffersink.h"
46
# include "libavfilter/buffersrc.h"
47 48
#endif

Fabrice Bellard's avatar
Fabrice Bellard committed
49 50 51 52 53
#include "cmdutils.h"

#include <SDL.h>
#include <SDL_thread.h>

54
#ifdef __MINGW32__
55 56 57
#undef main /* We don't want SDL to override our main() */
#endif

Michael Niedermayer's avatar
Michael Niedermayer committed
58 59
#include <assert.h>

Anton Khirnov's avatar
Anton Khirnov committed
60
const char program_name[] = "avplay";
61
const int program_birth_year = 2003;
62

63 64 65
#define MAX_QUEUE_SIZE (15 * 1024 * 1024)
#define MIN_AUDIOQ_SIZE (20 * 16 * 1024)
#define MIN_FRAMES 5
Fabrice Bellard's avatar
Fabrice Bellard committed
66

67 68 69 70 71
/* SDL audio buffer size, in samples. Should be small to have precise
   A/V sync as SDL does not have hardware buffer fullness info. */
#define SDL_AUDIO_BUFFER_SIZE 1024

/* no AV sync correction is done if below the AV sync threshold */
72
#define AV_SYNC_THRESHOLD 0.01
73 74 75
/* no AV correction is done if too big error */
#define AV_NOSYNC_THRESHOLD 10.0

Michael Niedermayer's avatar
Michael Niedermayer committed
76 77
#define FRAME_SKIP_FACTOR 0.05

78 79 80 81 82 83
/* maximum audio speed change to get correct sync */
#define SAMPLE_CORRECTION_PERCENT_MAX 10

/* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
#define AUDIO_DIFF_AVG_NB   20

Fabrice Bellard's avatar
Fabrice Bellard committed
84
/* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
Aneesh Dogra's avatar
Aneesh Dogra committed
85
#define SAMPLE_ARRAY_SIZE (2 * 65536)
Fabrice Bellard's avatar
Fabrice Bellard committed
86

87 88
static int sws_flags = SWS_BICUBIC;

Fabrice Bellard's avatar
Fabrice Bellard committed
89 90 91 92 93 94 95 96 97
typedef struct PacketQueue {
    AVPacketList *first_pkt, *last_pkt;
    int nb_packets;
    int size;
    int abort_request;
    SDL_mutex *mutex;
    SDL_cond *cond;
} PacketQueue;

98
#define VIDEO_PICTURE_QUEUE_SIZE 2
99
#define SUBPICTURE_QUEUE_SIZE 4
Fabrice Bellard's avatar
Fabrice Bellard committed
100 101

typedef struct VideoPicture {
102 103 104
    double pts;             // presentation timestamp for this picture
    double target_clock;    // av_gettime() time at which this should be displayed ideally
    int64_t pos;            // byte position in file
Fabrice Bellard's avatar
Fabrice Bellard committed
105 106 107
    SDL_Overlay *bmp;
    int width, height; /* source height & width */
    int allocated;
108
    int reallocate;
109
    enum AVPixelFormat pix_fmt;
110 111

#if CONFIG_AVFILTER
112
    AVFilterBufferRef *picref;
113
#endif
Fabrice Bellard's avatar
Fabrice Bellard committed
114 115
} VideoPicture;

116 117 118 119 120
typedef struct SubPicture {
    double pts; /* presentation time stamp for this picture */
    AVSubtitle sub;
} SubPicture;

Fabrice Bellard's avatar
Fabrice Bellard committed
121 122 123
enum {
    AV_SYNC_AUDIO_MASTER, /* default choice */
    AV_SYNC_VIDEO_MASTER,
124
    AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
Fabrice Bellard's avatar
Fabrice Bellard committed
125 126 127 128 129
};

typedef struct VideoState {
    SDL_Thread *parse_tid;
    SDL_Thread *video_tid;
Michael Niedermayer's avatar
Michael Niedermayer committed
130
    SDL_Thread *refresh_tid;
131
    AVInputFormat *iformat;
Fabrice Bellard's avatar
Fabrice Bellard committed
132 133 134
    int no_background;
    int abort_request;
    int paused;
135
    int last_paused;
Fabrice Bellard's avatar
Fabrice Bellard committed
136
    int seek_req;
137
    int seek_flags;
Fabrice Bellard's avatar
Fabrice Bellard committed
138
    int64_t seek_pos;
139
    int64_t seek_rel;
140
    int read_pause_return;
Fabrice Bellard's avatar
Fabrice Bellard committed
141 142 143
    AVFormatContext *ic;

    int audio_stream;
144

Fabrice Bellard's avatar
Fabrice Bellard committed
145
    int av_sync_type;
146 147
    double external_clock; /* external clock base */
    int64_t external_clock_time;
148

149 150 151 152 153
    double audio_clock;
    double audio_diff_cum; /* used for AV difference average computation */
    double audio_diff_avg_coef;
    double audio_diff_threshold;
    int audio_diff_avg_count;
Fabrice Bellard's avatar
Fabrice Bellard committed
154 155 156
    AVStream *audio_st;
    PacketQueue audioq;
    int audio_hw_buf_size;
157
    uint8_t silence_buf[SDL_AUDIO_BUFFER_SIZE];
158
    uint8_t *audio_buf;
159
    uint8_t *audio_buf1;
160
    unsigned int audio_buf_size; /* in bytes */
Fabrice Bellard's avatar
Fabrice Bellard committed
161
    int audio_buf_index; /* in bytes */
162
    AVPacket audio_pkt_temp;
Fabrice Bellard's avatar
Fabrice Bellard committed
163
    AVPacket audio_pkt;
164 165 166
    enum AVSampleFormat sdl_sample_fmt;
    uint64_t sdl_channel_layout;
    int sdl_channels;
167
    int sdl_sample_rate;
168 169
    enum AVSampleFormat resample_sample_fmt;
    uint64_t resample_channel_layout;
170
    int resample_sample_rate;
171
    AVAudioResampleContext *avr;
172
    AVFrame *frame;
173

Fabrice Bellard's avatar
Fabrice Bellard committed
174 175 176
    int show_audio; /* if true, display audio samples */
    int16_t sample_array[SAMPLE_ARRAY_SIZE];
    int sample_array_index;
177
    int last_i_start;
178
    RDFTContext *rdft;
179
    int rdft_bits;
Måns Rullgård's avatar
Måns Rullgård committed
180
    FFTSample *rdft_data;
181
    int xpos;
182

183 184 185 186 187 188 189 190 191
    SDL_Thread *subtitle_tid;
    int subtitle_stream;
    int subtitle_stream_changed;
    AVStream *subtitle_st;
    PacketQueue subtitleq;
    SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
    int subpq_size, subpq_rindex, subpq_windex;
    SDL_mutex *subpq_mutex;
    SDL_cond *subpq_cond;
192

193 194 195
    double frame_timer;
    double frame_last_pts;
    double frame_last_delay;
196
    double video_clock;             // pts of last decoded frame / predicted pts of next decoded frame
Fabrice Bellard's avatar
Fabrice Bellard committed
197 198 199
    int video_stream;
    AVStream *video_st;
    PacketQueue videoq;
200 201 202
    double video_current_pts;       // current displayed pts (different from video_clock if frame fifos are used)
    double video_current_pts_drift; // video_current_pts - time (av_gettime) at which we updated video_current_pts - used to have running video pts
    int64_t video_current_pos;      // current displayed file pos
Fabrice Bellard's avatar
Fabrice Bellard committed
203 204 205 206
    VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
    int pictq_size, pictq_rindex, pictq_windex;
    SDL_mutex *pictq_mutex;
    SDL_cond *pictq_cond;
207
#if !CONFIG_AVFILTER
208
    struct SwsContext *img_convert_ctx;
209
#endif
210

Fabrice Bellard's avatar
Fabrice Bellard committed
211 212 213
    //    QETimer *video_timer;
    char filename[1024];
    int width, height, xleft, ytop;
214

215
    PtsCorrectionContext pts_ctx;
216

217
#if CONFIG_AVFILTER
218 219
    AVFilterContext *in_video_filter;   // the first filter in the video chain
    AVFilterContext *out_video_filter;  // the last filter in the video chain
220 221
    int use_dr1;
    FrameBuffer *buffer_pool;
222
#endif
Michael Niedermayer's avatar
Michael Niedermayer committed
223 224 225 226

    float skip_frames;
    float skip_frames_index;
    int refresh;
Fabrice Bellard's avatar
Fabrice Bellard committed
227 228 229 230 231
} VideoState;

/* options specified by the user */
static AVInputFormat *file_iformat;
static const char *input_filename;
232
static const char *window_title;
Fabrice Bellard's avatar
Fabrice Bellard committed
233 234
static int fs_screen_width;
static int fs_screen_height;
Aneesh Dogra's avatar
Aneesh Dogra committed
235
static int screen_width  = 0;
236
static int screen_height = 0;
Fabrice Bellard's avatar
Fabrice Bellard committed
237 238
static int audio_disable;
static int video_disable;
Aneesh Dogra's avatar
Aneesh Dogra committed
239 240 241 242
static int wanted_stream[AVMEDIA_TYPE_NB] = {
    [AVMEDIA_TYPE_AUDIO]    = -1,
    [AVMEDIA_TYPE_VIDEO]    = -1,
    [AVMEDIA_TYPE_SUBTITLE] = -1,
243
};
Aneesh Dogra's avatar
Aneesh Dogra committed
244
static int seek_by_bytes = -1;
Fabrice Bellard's avatar
Fabrice Bellard committed
245
static int display_disable;
246
static int show_status = 1;
247
static int av_sync_type = AV_SYNC_AUDIO_MASTER;
Fabrice Bellard's avatar
Fabrice Bellard committed
248
static int64_t start_time = AV_NOPTS_VALUE;
Robert Krüger's avatar
Robert Krüger committed
249
static int64_t duration = AV_NOPTS_VALUE;
250
static int debug = 0;
251
static int debug_mv = 0;
252
static int step = 0;
Michael Niedermayer's avatar
-bug  
Michael Niedermayer committed
253
static int workaround_bugs = 1;
254
static int fast = 0;
255
static int genpts = 0;
Michael Niedermayer's avatar
Michael Niedermayer committed
256
static int idct = FF_IDCT_AUTO;
Aneesh Dogra's avatar
Aneesh Dogra committed
257 258 259
static enum AVDiscard skip_frame       = AVDISCARD_DEFAULT;
static enum AVDiscard skip_idct        = AVDISCARD_DEFAULT;
static enum AVDiscard skip_loop_filter = AVDISCARD_DEFAULT;
260
static int error_concealment = 3;
Aneesh Dogra's avatar
Aneesh Dogra committed
261
static int decoder_reorder_pts = -1;
Michael Niedermayer's avatar
Michael Niedermayer committed
262
static int autoexit;
263 264
static int exit_on_keydown;
static int exit_on_mousedown;
Aneesh Dogra's avatar
Aneesh Dogra committed
265 266
static int loop = 1;
static int framedrop = 1;
267
static int infinite_buffer = 0;
268

Aneesh Dogra's avatar
Aneesh Dogra committed
269
static int rdftspeed = 20;
270 271 272
#if CONFIG_AVFILTER
static char *vfilters = NULL;
#endif
Fabrice Bellard's avatar
Fabrice Bellard committed
273 274 275 276

/* current context */
static int is_full_screen;
static VideoState *cur_stream;
277
static int64_t audio_callback_time;
Fabrice Bellard's avatar
Fabrice Bellard committed
278

279
static AVPacket flush_pkt;
280

Fabrice Bellard's avatar
Fabrice Bellard committed
281 282
#define FF_ALLOC_EVENT   (SDL_USEREVENT)
#define FF_REFRESH_EVENT (SDL_USEREVENT + 1)
283
#define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
Fabrice Bellard's avatar
Fabrice Bellard committed
284

285
static SDL_Surface *screen;
Fabrice Bellard's avatar
Fabrice Bellard committed
286

287 288
static int packet_queue_put(PacketQueue *q, AVPacket *pkt);

Fabrice Bellard's avatar
Fabrice Bellard committed
289 290 291 292 293 294
/* packet queue handling */
static void packet_queue_init(PacketQueue *q)
{
    memset(q, 0, sizeof(PacketQueue));
    q->mutex = SDL_CreateMutex();
    q->cond = SDL_CreateCond();
295
    packet_queue_put(q, &flush_pkt);
Fabrice Bellard's avatar
Fabrice Bellard committed
296 297
}

Fabrice Bellard's avatar
Fabrice Bellard committed
298
static void packet_queue_flush(PacketQueue *q)
Fabrice Bellard's avatar
Fabrice Bellard committed
299 300 301
{
    AVPacketList *pkt, *pkt1;

302
    SDL_LockMutex(q->mutex);
Aneesh Dogra's avatar
Aneesh Dogra committed
303
    for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
Fabrice Bellard's avatar
Fabrice Bellard committed
304 305
        pkt1 = pkt->next;
        av_free_packet(&pkt->pkt);
306
        av_freep(&pkt);
Fabrice Bellard's avatar
Fabrice Bellard committed
307
    }
Fabrice Bellard's avatar
Fabrice Bellard committed
308 309 310 311
    q->last_pkt = NULL;
    q->first_pkt = NULL;
    q->nb_packets = 0;
    q->size = 0;
312
    SDL_UnlockMutex(q->mutex);
Fabrice Bellard's avatar
Fabrice Bellard committed
313 314 315 316 317
}

static void packet_queue_end(PacketQueue *q)
{
    packet_queue_flush(q);
Fabrice Bellard's avatar
Fabrice Bellard committed
318 319 320 321 322 323 324 325
    SDL_DestroyMutex(q->mutex);
    SDL_DestroyCond(q->cond);
}

static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
{
    AVPacketList *pkt1;

Fabrice Bellard's avatar
Fabrice Bellard committed
326
    /* duplicate the packet */
Aneesh Dogra's avatar
Aneesh Dogra committed
327
    if (pkt != &flush_pkt && av_dup_packet(pkt) < 0)
Fabrice Bellard's avatar
Fabrice Bellard committed
328
        return -1;
329

Fabrice Bellard's avatar
Fabrice Bellard committed
330 331 332 333 334 335
    pkt1 = av_malloc(sizeof(AVPacketList));
    if (!pkt1)
        return -1;
    pkt1->pkt = *pkt;
    pkt1->next = NULL;

Fabrice Bellard's avatar
Fabrice Bellard committed
336

Fabrice Bellard's avatar
Fabrice Bellard committed
337 338 339 340 341 342 343 344 345
    SDL_LockMutex(q->mutex);

    if (!q->last_pkt)

        q->first_pkt = pkt1;
    else
        q->last_pkt->next = pkt1;
    q->last_pkt = pkt1;
    q->nb_packets++;
346
    q->size += pkt1->pkt.size + sizeof(*pkt1);
Fabrice Bellard's avatar
Fabrice Bellard committed
347 348 349 350 351 352 353 354 355 356 357 358
    /* XXX: should duplicate packet data in DV case */
    SDL_CondSignal(q->cond);

    SDL_UnlockMutex(q->mutex);
    return 0;
}

static void packet_queue_abort(PacketQueue *q)
{
    SDL_LockMutex(q->mutex);

    q->abort_request = 1;
359

Fabrice Bellard's avatar
Fabrice Bellard committed
360 361 362 363 364 365 366 367 368 369 370 371 372
    SDL_CondSignal(q->cond);

    SDL_UnlockMutex(q->mutex);
}

/* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block)
{
    AVPacketList *pkt1;
    int ret;

    SDL_LockMutex(q->mutex);

Aneesh Dogra's avatar
Aneesh Dogra committed
373
    for (;;) {
Fabrice Bellard's avatar
Fabrice Bellard committed
374 375 376 377
        if (q->abort_request) {
            ret = -1;
            break;
        }
378

Fabrice Bellard's avatar
Fabrice Bellard committed
379 380 381 382 383 384
        pkt1 = q->first_pkt;
        if (pkt1) {
            q->first_pkt = pkt1->next;
            if (!q->first_pkt)
                q->last_pkt = NULL;
            q->nb_packets--;
385
            q->size -= pkt1->pkt.size + sizeof(*pkt1);
Fabrice Bellard's avatar
Fabrice Bellard committed
386 387 388 389 390 391 392 393 394 395 396 397 398 399 400
            *pkt = pkt1->pkt;
            av_free(pkt1);
            ret = 1;
            break;
        } else if (!block) {
            ret = 0;
            break;
        } else {
            SDL_CondWait(q->cond, q->mutex);
        }
    }
    SDL_UnlockMutex(q->mutex);
    return ret;
}

401
static inline void fill_rectangle(SDL_Surface *screen,
Fabrice Bellard's avatar
Fabrice Bellard committed
402 403 404 405 406 407 408 409 410 411
                                  int x, int y, int w, int h, int color)
{
    SDL_Rect rect;
    rect.x = x;
    rect.y = y;
    rect.w = w;
    rect.h = h;
    SDL_FillRect(screen, &rect, color);
}

412 413 414 415 416 417 418 419 420 421 422 423 424 425
#define ALPHA_BLEND(a, oldp, newp, s)\
((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))

#define RGBA_IN(r, g, b, a, s)\
{\
    unsigned int v = ((const uint32_t *)(s))[0];\
    a = (v >> 24) & 0xff;\
    r = (v >> 16) & 0xff;\
    g = (v >> 8) & 0xff;\
    b = v & 0xff;\
}

#define YUVA_IN(y, u, v, a, s, pal)\
{\
426
    unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\
427 428 429 430 431 432 433 434 435 436 437 438 439 440
    a = (val >> 24) & 0xff;\
    y = (val >> 16) & 0xff;\
    u = (val >> 8) & 0xff;\
    v = val & 0xff;\
}

#define YUVA_OUT(d, y, u, v, a)\
{\
    ((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
}


#define BPP 1

441
static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)
442 443 444 445 446 447
{
    int wrap, wrap3, width2, skip2;
    int y, u, v, a, u1, v1, a1, w, h;
    uint8_t *lum, *cb, *cr;
    const uint8_t *p;
    const uint32_t *pal;
448 449
    int dstx, dsty, dstw, dsth;

450 451 452 453
    dstw = av_clip(rect->w, 0, imgw);
    dsth = av_clip(rect->h, 0, imgh);
    dstx = av_clip(rect->x, 0, imgw - dstw);
    dsty = av_clip(rect->y, 0, imgh - dsth);
454
    lum = dst->data[0] + dsty * dst->linesize[0];
Aneesh Dogra's avatar
Aneesh Dogra committed
455 456
    cb  = dst->data[1] + (dsty >> 1) * dst->linesize[1];
    cr  = dst->data[2] + (dsty >> 1) * dst->linesize[2];
457

458
    width2 = ((dstw + 1) >> 1) + (dstx & ~dstw & 1);
459
    skip2 = dstx >> 1;
460
    wrap = dst->linesize[0];
461 462 463
    wrap3 = rect->pict.linesize[0];
    p = rect->pict.data[0];
    pal = (const uint32_t *)rect->pict.data[1];  /* Now in YCrCb! */
464

465 466
    if (dsty & 1) {
        lum += dstx;
467 468
        cb += skip2;
        cr += skip2;
469

470
        if (dstx & 1) {
471 472 473 474 475 476 477 478 479
            YUVA_IN(y, u, v, a, p, pal);
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
            cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
            cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
            cb++;
            cr++;
            lum++;
            p += BPP;
        }
Aneesh Dogra's avatar
Aneesh Dogra committed
480
        for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503
            YUVA_IN(y, u, v, a, p, pal);
            u1 = u;
            v1 = v;
            a1 = a;
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);

            YUVA_IN(y, u, v, a, p + BPP, pal);
            u1 += u;
            v1 += v;
            a1 += a;
            lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
            cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
            cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
            cb++;
            cr++;
            p += 2 * BPP;
            lum += 2;
        }
        if (w) {
            YUVA_IN(y, u, v, a, p, pal);
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
            cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
            cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
504 505
            p++;
            lum++;
506
        }
507 508
        p += wrap3 - dstw * BPP;
        lum += wrap - dstw - dstx;
509 510 511
        cb += dst->linesize[1] - width2 - skip2;
        cr += dst->linesize[2] - width2 - skip2;
    }
Aneesh Dogra's avatar
Aneesh Dogra committed
512
    for (h = dsth - (dsty & 1); h >= 2; h -= 2) {
513
        lum += dstx;
514 515
        cb += skip2;
        cr += skip2;
516

517
        if (dstx & 1) {
518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536
            YUVA_IN(y, u, v, a, p, pal);
            u1 = u;
            v1 = v;
            a1 = a;
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
            p += wrap3;
            lum += wrap;
            YUVA_IN(y, u, v, a, p, pal);
            u1 += u;
            v1 += v;
            a1 += a;
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
            cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
            cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
            cb++;
            cr++;
            p += -wrap3 + BPP;
            lum += -wrap + 1;
        }
Aneesh Dogra's avatar
Aneesh Dogra committed
537
        for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
538 539 540 541 542 543
            YUVA_IN(y, u, v, a, p, pal);
            u1 = u;
            v1 = v;
            a1 = a;
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);

544
            YUVA_IN(y, u, v, a, p + BPP, pal);
545 546 547 548 549 550 551 552 553 554 555 556 557
            u1 += u;
            v1 += v;
            a1 += a;
            lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
            p += wrap3;
            lum += wrap;

            YUVA_IN(y, u, v, a, p, pal);
            u1 += u;
            v1 += v;
            a1 += a;
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);

558
            YUVA_IN(y, u, v, a, p + BPP, pal);
559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591
            u1 += u;
            v1 += v;
            a1 += a;
            lum[1] = ALPHA_BLEND(a, lum[1], y, 0);

            cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
            cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);

            cb++;
            cr++;
            p += -wrap3 + 2 * BPP;
            lum += -wrap + 2;
        }
        if (w) {
            YUVA_IN(y, u, v, a, p, pal);
            u1 = u;
            v1 = v;
            a1 = a;
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
            p += wrap3;
            lum += wrap;
            YUVA_IN(y, u, v, a, p, pal);
            u1 += u;
            v1 += v;
            a1 += a;
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
            cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
            cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
            cb++;
            cr++;
            p += -wrap3 + BPP;
            lum += -wrap + 1;
        }
592 593
        p += wrap3 + (wrap3 - dstw * BPP);
        lum += wrap + (wrap - dstw - dstx);
594 595 596 597 598
        cb += dst->linesize[1] - width2 - skip2;
        cr += dst->linesize[2] - width2 - skip2;
    }
    /* handle odd height */
    if (h) {
599
        lum += dstx;
600 601
        cb += skip2;
        cr += skip2;
602

603
        if (dstx & 1) {
604 605 606 607 608 609 610 611 612
            YUVA_IN(y, u, v, a, p, pal);
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
            cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
            cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
            cb++;
            cr++;
            lum++;
            p += BPP;
        }
Aneesh Dogra's avatar
Aneesh Dogra committed
613
        for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642
            YUVA_IN(y, u, v, a, p, pal);
            u1 = u;
            v1 = v;
            a1 = a;
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);

            YUVA_IN(y, u, v, a, p + BPP, pal);
            u1 += u;
            v1 += v;
            a1 += a;
            lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
            cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
            cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
            cb++;
            cr++;
            p += 2 * BPP;
            lum += 2;
        }
        if (w) {
            YUVA_IN(y, u, v, a, p, pal);
            lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
            cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
            cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
        }
    }
}

static void free_subpicture(SubPicture *sp)
{
643
    avsubtitle_free(&sp->sub);
644 645
}

Fabrice Bellard's avatar
Fabrice Bellard committed
646 647 648
static void video_image_display(VideoState *is)
{
    VideoPicture *vp;
649 650
    SubPicture *sp;
    AVPicture pict;
Fabrice Bellard's avatar
Fabrice Bellard committed
651 652 653
    float aspect_ratio;
    int width, height, x, y;
    SDL_Rect rect;
654
    int i;
Fabrice Bellard's avatar
Fabrice Bellard committed
655 656 657

    vp = &is->pictq[is->pictq_rindex];
    if (vp->bmp) {
658
#if CONFIG_AVFILTER
659
         if (vp->picref->video->pixel_aspect.num == 0)
660 661
             aspect_ratio = 0;
         else
662
             aspect_ratio = av_q2d(vp->picref->video->pixel_aspect);
663 664
#else

Fabrice Bellard's avatar
Fabrice Bellard committed
665
        /* XXX: use variable in the frame */
666 667 668 669
        if (is->video_st->sample_aspect_ratio.num)
            aspect_ratio = av_q2d(is->video_st->sample_aspect_ratio);
        else if (is->video_st->codec->sample_aspect_ratio.num)
            aspect_ratio = av_q2d(is->video_st->codec->sample_aspect_ratio);
Fabrice Bellard's avatar
Fabrice Bellard committed
670
        else
671
            aspect_ratio = 0;
672
#endif
Fabrice Bellard's avatar
Fabrice Bellard committed
673
        if (aspect_ratio <= 0.0)
674
            aspect_ratio = 1.0;
675
        aspect_ratio *= (float)vp->width / (float)vp->height;
Fabrice Bellard's avatar
Fabrice Bellard committed
676

677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695
        if (is->subtitle_st)
        {
            if (is->subpq_size > 0)
            {
                sp = &is->subpq[is->subpq_rindex];

                if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000))
                {
                    SDL_LockYUVOverlay (vp->bmp);

                    pict.data[0] = vp->bmp->pixels[0];
                    pict.data[1] = vp->bmp->pixels[2];
                    pict.data[2] = vp->bmp->pixels[1];

                    pict.linesize[0] = vp->bmp->pitches[0];
                    pict.linesize[1] = vp->bmp->pitches[2];
                    pict.linesize[2] = vp->bmp->pitches[1];

                    for (i = 0; i < sp->sub.num_rects; i++)
696
                        blend_subrect(&pict, sp->sub.rects[i],
697
                                      vp->bmp->w, vp->bmp->h);
698 699 700 701 702 703 704

                    SDL_UnlockYUVOverlay (vp->bmp);
                }
            }
        }


Fabrice Bellard's avatar
Fabrice Bellard committed
705 706
        /* XXX: we suppose the screen has a 1.0 pixel ratio */
        height = is->height;
707
        width = ((int)rint(height * aspect_ratio)) & ~1;
Fabrice Bellard's avatar
Fabrice Bellard committed
708 709
        if (width > is->width) {
            width = is->width;
710
            height = ((int)rint(width / aspect_ratio)) & ~1;
Fabrice Bellard's avatar
Fabrice Bellard committed
711 712 713
        }
        x = (is->width - width) / 2;
        y = (is->height - height) / 2;
Diego Biurrun's avatar
Diego Biurrun committed
714
        is->no_background = 0;
Fabrice Bellard's avatar
Fabrice Bellard committed
715
        rect.x = is->xleft + x;
Baptiste Coudurier's avatar
Baptiste Coudurier committed
716
        rect.y = is->ytop  + y;
Fabrice Bellard's avatar
Fabrice Bellard committed
717 718 719 720 721 722
        rect.w = width;
        rect.h = height;
        SDL_DisplayYUVOverlay(vp->bmp, &rect);
    }
}

723 724 725 726 727 728 729
/* get the current audio output buffer size, in samples. With SDL, we
   cannot have a precise information */
static int audio_write_get_buf_size(VideoState *is)
{
    return is->audio_buf_size - is->audio_buf_index;
}

Fabrice Bellard's avatar
Fabrice Bellard committed
730 731 732
static inline int compute_mod(int a, int b)
{
    a = a % b;
733
    if (a >= 0)
Fabrice Bellard's avatar
Fabrice Bellard committed
734 735 736 737 738 739 740 741 742 743
        return a;
    else
        return a + b;
}

static void video_audio_display(VideoState *s)
{
    int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
    int ch, channels, h, h2, bgcolor, fgcolor;
    int16_t time_diff;
744 745
    int rdft_bits, nb_freq;

Aneesh Dogra's avatar
Aneesh Dogra committed
746
    for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
747
        ;
Aneesh Dogra's avatar
Aneesh Dogra committed
748
    nb_freq = 1 << (rdft_bits - 1);
749

Fabrice Bellard's avatar
Fabrice Bellard committed
750
    /* compute display index : center on currently output samples */
751
    channels = s->sdl_channels;
Fabrice Bellard's avatar
Fabrice Bellard committed
752
    nb_display_channels = channels;
753
    if (!s->paused) {
Aneesh Dogra's avatar
Aneesh Dogra committed
754
        int data_used = s->show_audio == 1 ? s->width : (2 * nb_freq);
755 756 757
        n = 2 * channels;
        delay = audio_write_get_buf_size(s);
        delay /= n;
758

759 760 761 762
        /* to be more precise, we take into account the time spent since
           the last buffer computation */
        if (audio_callback_time) {
            time_diff = av_gettime() - audio_callback_time;
763
            delay -= (time_diff * s->sdl_sample_rate) / 1000000;
764
        }
765

Aneesh Dogra's avatar
Aneesh Dogra committed
766
        delay += 2 * data_used;
767 768
        if (delay < data_used)
            delay = data_used;
769 770

        i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
Aneesh Dogra's avatar
Aneesh Dogra committed
771 772 773 774 775 776 777 778 779 780 781 782
        if (s->show_audio == 1) {
            h = INT_MIN;
            for (i = 0; i < 1000; i += channels) {
                int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
                int a = s->sample_array[idx];
                int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
                int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
                int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
                int score = a - d;
                if (h < score && (b ^ c) < 0) {
                    h = score;
                    i_start = idx;
783
                }
784 785 786
            }
        }

787 788 789
        s->last_i_start = i_start;
    } else {
        i_start = s->last_i_start;
Fabrice Bellard's avatar
Fabrice Bellard committed
790 791 792
    }

    bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
Aneesh Dogra's avatar
Aneesh Dogra committed
793
    if (s->show_audio == 1) {
794 795 796 797 798 799 800 801 802 803
        fill_rectangle(screen,
                       s->xleft, s->ytop, s->width, s->height,
                       bgcolor);

        fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);

        /* total height for one channel */
        h = s->height / nb_display_channels;
        /* graph height / 2 */
        h2 = (h * 9) / 20;
Aneesh Dogra's avatar
Aneesh Dogra committed
804
        for (ch = 0; ch < nb_display_channels; ch++) {
805 806
            i = i_start + ch;
            y1 = s->ytop + ch * h + (h / 2); /* position of center line */
Aneesh Dogra's avatar
Aneesh Dogra committed
807
            for (x = 0; x < s->width; x++) {
808 809 810 811 812 813 814 815 816 817 818 819 820
                y = (s->sample_array[i] * h2) >> 15;
                if (y < 0) {
                    y = -y;
                    ys = y1 - y;
                } else {
                    ys = y1;
                }
                fill_rectangle(screen,
                               s->xleft + x, ys, 1, y,
                               fgcolor);
                i += channels;
                if (i >= SAMPLE_ARRAY_SIZE)
                    i -= SAMPLE_ARRAY_SIZE;
Fabrice Bellard's avatar
Fabrice Bellard committed
821 822 823
            }
        }

824
        fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
Fabrice Bellard's avatar
Fabrice Bellard committed
825

Aneesh Dogra's avatar
Aneesh Dogra committed
826
        for (ch = 1; ch < nb_display_channels; ch++) {
827 828 829 830 831 832
            y = s->ytop + ch * h;
            fill_rectangle(screen,
                           s->xleft, y, s->width, 1,
                           fgcolor);
        }
        SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
Aneesh Dogra's avatar
Aneesh Dogra committed
833
    } else {
834
        nb_display_channels= FFMIN(nb_display_channels, 2);
Aneesh Dogra's avatar
Aneesh Dogra committed
835
        if (rdft_bits != s->rdft_bits) {
836
            av_rdft_end(s->rdft);
Måns Rullgård's avatar
Måns Rullgård committed
837
            av_free(s->rdft_data);
838
            s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
Aneesh Dogra's avatar
Aneesh Dogra committed
839 840
            s->rdft_bits = rdft_bits;
            s->rdft_data = av_malloc(4 * nb_freq * sizeof(*s->rdft_data));
841 842
        }
        {
Måns Rullgård's avatar
Måns Rullgård committed
843
            FFTSample *data[2];
Aneesh Dogra's avatar
Aneesh Dogra committed
844 845
            for (ch = 0; ch < nb_display_channels; ch++) {
                data[ch] = s->rdft_data + 2 * nb_freq * ch;
846
                i = i_start + ch;
Aneesh Dogra's avatar
Aneesh Dogra committed
847 848 849
                for (x = 0; x < 2 * nb_freq; x++) {
                    double w = (x-nb_freq) * (1.0 / nb_freq);
                    data[ch][x] = s->sample_array[i] * (1.0 - w * w);
850 851 852 853
                    i += channels;
                    if (i >= SAMPLE_ARRAY_SIZE)
                        i -= SAMPLE_ARRAY_SIZE;
                }
854
                av_rdft_calc(s->rdft, data[ch]);
855
            }
Aneesh Dogra's avatar
Aneesh Dogra committed
856 857 858 859 860 861 862 863 864
            // least efficient way to do this, we should of course directly access it but its more than fast enough
            for (y = 0; y < s->height; y++) {
                double w = 1 / sqrt(nb_freq);
                int a = sqrt(w * sqrt(data[0][2 * y + 0] * data[0][2 * y + 0] + data[0][2 * y + 1] * data[0][2 * y + 1]));
                int b = (nb_display_channels == 2 ) ? sqrt(w * sqrt(data[1][2 * y + 0] * data[1][2 * y + 0]
                       + data[1][2 * y + 1] * data[1][2 * y + 1])) : a;
                a = FFMIN(a, 255);
                b = FFMIN(b, 255);
                fgcolor = SDL_MapRGB(screen->format, a, b, (a + b) / 2);
865 866 867 868 869 870 871 872

                fill_rectangle(screen,
                            s->xpos, s->height-y, 1, 1,
                            fgcolor);
            }
        }
        SDL_UpdateRect(screen, s->xpos, s->ytop, 1, s->height);
        s->xpos++;
Aneesh Dogra's avatar
Aneesh Dogra committed
873
        if (s->xpos >= s->width)
874 875
            s->xpos= s->xleft;
    }
Fabrice Bellard's avatar
Fabrice Bellard committed
876 877
}

Aneesh Dogra's avatar
Aneesh Dogra committed
878 879 880
static int video_open(VideoState *is)
{
    int flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
881 882
    int w,h;

Aneesh Dogra's avatar
Aneesh Dogra committed
883 884
    if (is_full_screen) flags |= SDL_FULLSCREEN;
    else                flags |= SDL_RESIZABLE;
885

886 887 888
    if (is_full_screen && fs_screen_width) {
        w = fs_screen_width;
        h = fs_screen_height;
Aneesh Dogra's avatar
Aneesh Dogra committed
889
    } else if (!is_full_screen && screen_width) {
890 891
        w = screen_width;
        h = screen_height;
892
#if CONFIG_AVFILTER
Aneesh Dogra's avatar
Aneesh Dogra committed
893
    } else if (is->out_video_filter && is->out_video_filter->inputs[0]) {
894 895 896
        w = is->out_video_filter->inputs[0]->w;
        h = is->out_video_filter->inputs[0]->h;
#else
Aneesh Dogra's avatar
Aneesh Dogra committed
897
    } else if (is->video_st && is->video_st->codec->width) {
898 899
        w = is->video_st->codec->width;
        h = is->video_st->codec->height;
900
#endif
901
    } else {
902 903
        w = 640;
        h = 480;
904
    }
Aneesh Dogra's avatar
Aneesh Dogra committed
905
    if (screen && is->width == screen->w && screen->w == w
906 907 908
       && is->height== screen->h && screen->h == h)
        return 0;