ref: a99ae524a27afd38a252325abece355962c8cf6f
dir: /examples/dav1dplay.c/
/*
* Copyright © 2019, VideoLAN and dav1d authors
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "vcs_version.h"
#include <getopt.h>
#include <stdbool.h>
#include <SDL.h>
#include "dav1d/dav1d.h"
#include "common/attributes.h"
#include "tools/input/input.h"
#include "dp_fifo.h"
#include "dp_renderer.h"
// Selected renderer callbacks and cookie
static const Dav1dPlayRenderInfo *renderer_info = { NULL };
/**
* Render context structure
* This structure contains informations necessary
* to be shared between the decoder and the renderer
* threads.
*/
typedef struct render_context
{
Dav1dPlaySettings settings;
Dav1dSettings lib_settings;
// Renderer private data (passed to callbacks)
void *rd_priv;
// Lock to protect access to the context structure
SDL_mutex *lock;
// Timestamp of previous decoded frame
int64_t last_pts;
// Timestamp of current decoded frame
int64_t current_pts;
// Ticks when last frame was received
uint32_t last_ticks;
// PTS time base
double timebase;
// Fifo
Dav1dPlayPtrFifo *fifo;
// Custom SDL2 event type
uint32_t renderer_event_type;
// Indicates if termination of the decoder thread was requested
uint8_t dec_should_terminate;
} Dav1dPlayRenderContext;
static void dp_settings_print_usage(const char *const app,
const char *const reason, ...)
{
if (reason) {
va_list args;
va_start(args, reason);
vfprintf(stderr, reason, args);
va_end(args);
fprintf(stderr, "\n\n");
}
fprintf(stderr, "Usage: %s [options]\n\n", app);
fprintf(stderr, "Supported options:\n"
" --input/-i $file: input file\n"
" --untimed/-u: ignore PTS, render as fast as possible\n"
" --framethreads $num: number of frame threads (default: 1)\n"
" --tilethreads $num: number of tile threads (default: 1)\n"
" --highquality: enable high quality rendering\n"
" --zerocopy/-z: enable zero copy upload path\n"
" --gpugrain/-g: enable GPU grain synthesis\n"
" --version/-v: print version and exit\n"
" --renderer/-r: select renderer backend (default: auto)\n");
exit(1);
}
static unsigned parse_unsigned(const char *const optarg, const int option,
const char *const app)
{
char *end;
const unsigned res = (unsigned) strtoul(optarg, &end, 0);
if (*end || end == optarg)
dp_settings_print_usage(app, "Invalid argument \"%s\" for option %s; should be an integer",
optarg, option);
return res;
}
static void dp_rd_ctx_parse_args(Dav1dPlayRenderContext *rd_ctx,
const int argc, char *const *const argv)
{
int o;
Dav1dPlaySettings *settings = &rd_ctx->settings;
Dav1dSettings *lib_settings = &rd_ctx->lib_settings;
// Short options
static const char short_opts[] = "i:vuzgr:";
enum {
ARG_FRAME_THREADS = 256,
ARG_TILE_THREADS,
ARG_HIGH_QUALITY,
};
// Long options
static const struct option long_opts[] = {
{ "input", 1, NULL, 'i' },
{ "version", 0, NULL, 'v' },
{ "untimed", 0, NULL, 'u' },
{ "framethreads", 1, NULL, ARG_FRAME_THREADS },
{ "tilethreads", 1, NULL, ARG_TILE_THREADS },
{ "highquality", 0, NULL, ARG_HIGH_QUALITY },
{ "zerocopy", 0, NULL, 'z' },
{ "gpugrain", 0, NULL, 'g' },
{ "renderer", 0, NULL, 'r'},
{ NULL, 0, NULL, 0 },
};
while ((o = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
switch (o) {
case 'i':
settings->inputfile = optarg;
break;
case 'v':
fprintf(stderr, "%s\n", dav1d_version());
exit(0);
case 'u':
settings->untimed = true;
break;
case ARG_HIGH_QUALITY:
settings->highquality = true;
break;
case 'z':
settings->zerocopy = true;
break;
case 'g':
settings->gpugrain = true;
break;
case 'r':
settings->renderer_name = optarg;
break;
case ARG_FRAME_THREADS:
lib_settings->n_frame_threads =
parse_unsigned(optarg, ARG_FRAME_THREADS, argv[0]);
break;
case ARG_TILE_THREADS:
lib_settings->n_tile_threads =
parse_unsigned(optarg, ARG_TILE_THREADS, argv[0]);
break;
default:
dp_settings_print_usage(argv[0], NULL);
}
}
if (optind < argc)
dp_settings_print_usage(argv[0],
"Extra/unused arguments found, e.g. '%s'\n", argv[optind]);
if (!settings->inputfile)
dp_settings_print_usage(argv[0], "Input file (-i/--input) is required");
if (settings->renderer_name && strcmp(settings->renderer_name, "auto") == 0)
settings->renderer_name = NULL;
}
/**
* Destroy a Dav1dPlayRenderContext
*/
static void dp_rd_ctx_destroy(Dav1dPlayRenderContext *rd_ctx)
{
assert(rd_ctx != NULL);
renderer_info->destroy_renderer(rd_ctx->rd_priv);
dp_fifo_destroy(rd_ctx->fifo);
SDL_DestroyMutex(rd_ctx->lock);
free(rd_ctx);
}
/**
* Create a Dav1dPlayRenderContext
*
* \note The Dav1dPlayRenderContext must be destroyed
* again by using dp_rd_ctx_destroy.
*/
static Dav1dPlayRenderContext *dp_rd_ctx_create(int argc, char **argv)
{
Dav1dPlayRenderContext *rd_ctx;
// Alloc
rd_ctx = malloc(sizeof(Dav1dPlayRenderContext));
if (rd_ctx == NULL) {
return NULL;
}
// Register a custom event to notify our SDL main thread
// about new frames
rd_ctx->renderer_event_type = SDL_RegisterEvents(1);
if (rd_ctx->renderer_event_type == UINT32_MAX) {
fprintf(stderr, "Failure to create custom SDL event type!\n");
free(rd_ctx);
return NULL;
}
rd_ctx->fifo = dp_fifo_create(5);
if (rd_ctx->fifo == NULL) {
fprintf(stderr, "Failed to create FIFO for output pictures!\n");
free(rd_ctx);
return NULL;
}
rd_ctx->lock = SDL_CreateMutex();
if (rd_ctx->lock == NULL) {
fprintf(stderr, "SDL_CreateMutex failed: %s\n", SDL_GetError());
dp_fifo_destroy(rd_ctx->fifo);
free(rd_ctx);
return NULL;
}
// Parse and validate arguments
dav1d_default_settings(&rd_ctx->lib_settings);
memset(&rd_ctx->settings, 0, sizeof(rd_ctx->settings));
dp_rd_ctx_parse_args(rd_ctx, argc, argv);
// Select renderer
renderer_info = dp_get_renderer(rd_ctx->settings.renderer_name);
if (renderer_info == NULL) {
printf("No suitable rendered matching %s found.\n",
(rd_ctx->settings.renderer_name) ? rd_ctx->settings.renderer_name : "auto");
} else {
printf("Using %s renderer\n", renderer_info->name);
}
rd_ctx->rd_priv = (renderer_info) ? renderer_info->create_renderer() : NULL;
if (rd_ctx->rd_priv == NULL) {
SDL_DestroyMutex(rd_ctx->lock);
dp_fifo_destroy(rd_ctx->fifo);
free(rd_ctx);
return NULL;
}
rd_ctx->last_pts = 0;
rd_ctx->last_ticks = 0;
rd_ctx->current_pts = 0;
rd_ctx->timebase = 0;
rd_ctx->dec_should_terminate = 0;
return rd_ctx;
}
/**
* Notify about new available frame
*/
static void dp_rd_ctx_post_event(Dav1dPlayRenderContext *rd_ctx, uint32_t code)
{
SDL_Event event;
SDL_zero(event);
event.type = rd_ctx->renderer_event_type;
event.user.code = code;
SDL_PushEvent(&event);
}
/**
* Update the decoder context with a new dav1d picture
*
* Once the decoder decoded a new picture, this call can be used
* to update the internal texture of the render context with the
* new picture.
*/
static void dp_rd_ctx_update_with_dav1d_picture(Dav1dPlayRenderContext *rd_ctx,
Dav1dPicture *dav1d_pic)
{
renderer_info->update_frame(rd_ctx->rd_priv, dav1d_pic, &rd_ctx->settings);
rd_ctx->current_pts = dav1d_pic->m.timestamp;
}
/**
* Terminate decoder thread (async)
*/
static void dp_rd_ctx_request_shutdown(Dav1dPlayRenderContext *rd_ctx)
{
SDL_LockMutex(rd_ctx->lock);
rd_ctx->dec_should_terminate = 1;
SDL_UnlockMutex(rd_ctx->lock);
}
/**
* Query state of decoder shutdown request
*/
static int dp_rd_ctx_should_terminate(Dav1dPlayRenderContext *rd_ctx)
{
int ret = 0;
SDL_LockMutex(rd_ctx->lock);
ret = rd_ctx->dec_should_terminate;
SDL_UnlockMutex(rd_ctx->lock);
return ret;
}
/**
* Render the currently available texture
*
* Renders the currently available texture, if any.
*/
static void dp_rd_ctx_render(Dav1dPlayRenderContext *rd_ctx)
{
// Calculate time since last frame was received
uint32_t ticks_now = SDL_GetTicks();
uint32_t ticks_diff = (rd_ctx->last_ticks != 0) ? ticks_now - rd_ctx->last_ticks : 0;
// Calculate when to display the frame
int64_t pts_diff = rd_ctx->current_pts - rd_ctx->last_pts;
int32_t wait_time = (pts_diff * rd_ctx->timebase) * 1000 - ticks_diff;
rd_ctx->last_pts = rd_ctx->current_pts;
// In untimed mode, simply don't wait
if (rd_ctx->settings.untimed)
wait_time = 0;
// This way of timing the playback is not accurate, as there is no guarantee
// that SDL_Delay will wait for exactly the requested amount of time so in a
// accurate player this would need to be done in a better way.
if (wait_time > 0) {
SDL_Delay(wait_time);
} else if (wait_time < -10) { // Do not warn for minor time drifts
fprintf(stderr, "Frame displayed %f seconds too late\n", wait_time/(float)1000);
}
renderer_info->render(rd_ctx->rd_priv, &rd_ctx->settings);
rd_ctx->last_ticks = SDL_GetTicks();
}
/* Decoder thread "main" function */
static int decoder_thread_main(void *cookie)
{
Dav1dPlayRenderContext *rd_ctx = cookie;
Dav1dPicture *p;
Dav1dContext *c = NULL;
Dav1dData data;
DemuxerContext *in_ctx = NULL;
int res = 0;
unsigned n_out = 0, total, timebase[2], fps[2];
// Store current ticks for stats calculation
uint32_t decoder_start = SDL_GetTicks();
Dav1dPlaySettings settings = rd_ctx->settings;
if ((res = input_open(&in_ctx, "ivf",
settings.inputfile,
fps, &total, timebase)) < 0)
{
fprintf(stderr, "Failed to open demuxer\n");
res = 1;
goto cleanup;
}
double timebase_d = timebase[1]/(double)timebase[0];
rd_ctx->timebase = timebase_d;
if ((res = dav1d_open(&c, &rd_ctx->lib_settings))) {
fprintf(stderr, "Failed opening dav1d decoder\n");
res = 1;
goto cleanup;
}
if ((res = input_read(in_ctx, &data)) < 0) {
fprintf(stderr, "Failed demuxing input\n");
res = 1;
goto cleanup;
}
// Decoder loop
do {
if (dp_rd_ctx_should_terminate(rd_ctx))
break;
// Send data packets we got from the demuxer to dav1d
if ((res = dav1d_send_data(c, &data)) < 0) {
// On EAGAIN, dav1d can not consume more data and
// dav1d_get_picture needs to be called first, which
// will happen below, so just keep going in that case
// and do not error out.
if (res != DAV1D_ERR(EAGAIN)) {
dav1d_data_unref(&data);
fprintf(stderr, "Error decoding frame: %s\n",
strerror(-res));
break;
}
}
p = calloc(1, sizeof(*p));
// Try to get a decoded frame
if ((res = dav1d_get_picture(c, p)) < 0) {
// In all error cases, even EAGAIN, p needs to be freed as
// it is never added to the queue and would leak.
free(p);
// On EAGAIN, it means dav1d has not enough data to decode
// therefore this is not a decoding error but just means
// we need to feed it more data, which happens in the next
// run of this decoder loop.
if (res != DAV1D_ERR(EAGAIN)) {
fprintf(stderr, "Error decoding frame: %s\n",
strerror(-res));
break;
}
res = 0;
} else {
// Queue frame
dp_fifo_push(rd_ctx->fifo, p);
dp_rd_ctx_post_event(rd_ctx, DAV1D_EVENT_NEW_FRAME);
n_out++;
}
} while ((data.sz > 0 || !input_read(in_ctx, &data)));
// Release remaining data
if (data.sz > 0) dav1d_data_unref(&data);
// Do not drain in case an error occured and caused us to leave the
// decoding loop early.
if (res < 0)
goto cleanup;
// Drain decoder
// When there is no more data to feed to the decoder, for example
// because the file ended, we still need to request pictures, as
// even though we do not have more data, there can be frames decoded
// from data we sent before. So we need to call dav1d_get_picture until
// we get an EAGAIN error.
do {
if (dp_rd_ctx_should_terminate(rd_ctx))
break;
p = calloc(1, sizeof(*p));
res = dav1d_get_picture(c, p);
if (res < 0) {
free(p);
if (res != DAV1D_ERR(EAGAIN)) {
fprintf(stderr, "Error decoding frame: %s\n",
strerror(-res));
break;
}
} else {
// Queue frame
dp_fifo_push(rd_ctx->fifo, p);
dp_rd_ctx_post_event(rd_ctx, DAV1D_EVENT_NEW_FRAME);
n_out++;
}
} while (res != DAV1D_ERR(EAGAIN));
// Print stats
uint32_t decoding_time_ms = SDL_GetTicks() - decoder_start;
printf("Decoded %u frames in %d seconds, avg %.02f fps\n",
n_out, decoding_time_ms/1000, n_out / (decoding_time_ms / 1000.0));
cleanup:
dp_rd_ctx_post_event(rd_ctx, DAV1D_EVENT_DEC_QUIT);
if (in_ctx)
input_close(in_ctx);
if (c)
dav1d_close(&c);
return (res != DAV1D_ERR(EAGAIN) && res < 0);
}
int main(int argc, char **argv)
{
SDL_Thread *decoder_thread;
// Check for version mismatch between library and tool
const char *version = dav1d_version();
if (strcmp(version, DAV1D_VERSION)) {
fprintf(stderr, "Version mismatch (library: %s, executable: %s)\n",
version, DAV1D_VERSION);
return 1;
}
// Init SDL2 library
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) < 0)
return 10;
// Create render context
Dav1dPlayRenderContext *rd_ctx = dp_rd_ctx_create(argc, argv);
if (rd_ctx == NULL) {
fprintf(stderr, "Failed creating render context\n");
return 5;
}
if (rd_ctx->settings.zerocopy) {
if (renderer_info->alloc_pic) {
rd_ctx->lib_settings.allocator = (Dav1dPicAllocator) {
.cookie = rd_ctx->rd_priv,
.alloc_picture_callback = renderer_info->alloc_pic,
.release_picture_callback = renderer_info->release_pic,
};
} else {
fprintf(stderr, "--zerocopy unsupported by selected renderer\n");
}
}
if (rd_ctx->settings.gpugrain) {
if (renderer_info->supports_gpu_grain) {
rd_ctx->lib_settings.apply_grain = 0;
} else {
fprintf(stderr, "--gpugrain unsupported by selected renderer\n");
}
}
// Start decoder thread
decoder_thread = SDL_CreateThread(decoder_thread_main, "Decoder thread", rd_ctx);
// Main loop
while (1) {
SDL_Event e;
if (SDL_WaitEvent(&e)) {
if (e.type == SDL_QUIT) {
dp_rd_ctx_request_shutdown(rd_ctx);
} else if (e.type == SDL_WINDOWEVENT) {
if (e.window.event == SDL_WINDOWEVENT_SIZE_CHANGED) {
// TODO: Handle window resizes
}
} else if (e.type == rd_ctx->renderer_event_type) {
if (e.user.code == DAV1D_EVENT_NEW_FRAME) {
// Dequeue frame and update the render context with it
Dav1dPicture *p = dp_fifo_shift(rd_ctx->fifo);
// Do not update textures during termination
if (!dp_rd_ctx_should_terminate(rd_ctx))
dp_rd_ctx_update_with_dav1d_picture(rd_ctx, p);
dav1d_picture_unref(p);
free(p);
} else if (e.user.code == DAV1D_EVENT_DEC_QUIT) {
break;
}
}
}
// Do not render during termination
if (!dp_rd_ctx_should_terminate(rd_ctx))
dp_rd_ctx_render(rd_ctx);
}
int decoder_ret = 0;
SDL_WaitThread(decoder_thread, &decoder_ret);
dp_rd_ctx_destroy(rd_ctx);
return decoder_ret;
}