[deb_ffmpeg.git] / ffmpeg / libavcodec / frame_thread_encoder.c

/*
 * Copyright (c) 2012 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * 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
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "frame_thread_encoder.h"

#include "libavutil/fifo.h"
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "internal.h"
#include "thread.h"

#if HAVE_PTHREADS
#include <pthread.h>
#elif HAVE_W32THREADS
#include "compat/w32pthreads.h"
#elif HAVE_OS2THREADS
#include "compat/os2threads.h"
#endif

#define MAX_THREADS 64
#define BUFFER_SIZE (2*MAX_THREADS)

typedef struct{
    void *indata;
    void *outdata;
    int64_t return_code;
    unsigned index;
} Task;

typedef struct{
    AVCodecContext *parent_avctx;
    pthread_mutex_t buffer_mutex;

    AVFifoBuffer *task_fifo;
    pthread_mutex_t task_fifo_mutex;
    pthread_cond_t task_fifo_cond;

    Task finished_tasks[BUFFER_SIZE];
    pthread_mutex_t finished_task_mutex;
    pthread_cond_t finished_task_cond;

    unsigned task_index;
    unsigned finished_task_index;

    pthread_t worker[MAX_THREADS];
    int exit;
} ThreadContext;

static void * attribute_align_arg worker(void *v){
    AVCodecContext *avctx = v;
    ThreadContext *c = avctx->internal->frame_thread_encoder;
    AVPacket *pkt = NULL;

    while(!c->exit){
        int got_packet, ret;
        AVFrame *frame;
        Task task;

        if(!pkt) pkt= av_mallocz(sizeof(*pkt));
        if(!pkt) continue;
        av_init_packet(pkt);

        pthread_mutex_lock(&c->task_fifo_mutex);
        while (av_fifo_size(c->task_fifo) <= 0 || c->exit) {
            if(c->exit){
                pthread_mutex_unlock(&c->task_fifo_mutex);
                goto end;
            }
            pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
        }
        av_fifo_generic_read(c->task_fifo, &task, sizeof(task), NULL);
        pthread_mutex_unlock(&c->task_fifo_mutex);
        frame = task.indata;

        ret = avcodec_encode_video2(avctx, pkt, frame, &got_packet);
        pthread_mutex_lock(&c->buffer_mutex);
        av_frame_unref(frame);
        pthread_mutex_unlock(&c->buffer_mutex);
        av_frame_free(&frame);
        if(got_packet) {
            av_dup_packet(pkt);
        } else {
            pkt->data = NULL;
            pkt->size = 0;
        }
        pthread_mutex_lock(&c->finished_task_mutex);
        c->finished_tasks[task.index].outdata = pkt; pkt = NULL;
        c->finished_tasks[task.index].return_code = ret;
        pthread_cond_signal(&c->finished_task_cond);
        pthread_mutex_unlock(&c->finished_task_mutex);
    }
end:
    av_free(pkt);
    pthread_mutex_lock(&c->buffer_mutex);
    avcodec_close(avctx);
    pthread_mutex_unlock(&c->buffer_mutex);
    av_freep(&avctx);
    return NULL;
}

int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){
    int i=0;
    ThreadContext *c;


    if(   !(avctx->thread_type & FF_THREAD_FRAME)
       || !(avctx->codec->capabilities & CODEC_CAP_INTRA_ONLY))
        return 0;

    if(   !avctx->thread_count
       && avctx->codec_id == AV_CODEC_ID_MJPEG
       && !(avctx->flags & CODEC_FLAG_QSCALE)) {
        av_log(avctx, AV_LOG_DEBUG,
               "Forcing thread count to 1 for MJPEG encoding, use -thread_type slice "
               "or a constant quantizer if you want to use multiple cpu cores\n");
        avctx->thread_count = 1;
    }
    if(   avctx->thread_count > 1
       && avctx->codec_id == AV_CODEC_ID_MJPEG
       && !(avctx->flags & CODEC_FLAG_QSCALE))
        av_log(avctx, AV_LOG_WARNING,
               "MJPEG CBR encoding works badly with frame multi-threading, consider "
               "using -threads 1, -thread_type slice or a constant quantizer.\n");

    if (avctx->codec_id == AV_CODEC_ID_HUFFYUV ||
        avctx->codec_id == AV_CODEC_ID_FFVHUFF) {
        int warn = 0;
        if (avctx->flags & CODEC_FLAG_PASS1)
            warn = 1;
        else if(avctx->context_model > 0) {
            AVDictionaryEntry *t = av_dict_get(options, "non_deterministic",
                                               NULL, AV_DICT_MATCH_CASE);
            warn = !t || !t->value || !atoi(t->value) ? 1 : 0;
        }
        // huffyuv does not support these with multiple frame threads currently
        if (warn) {
            av_log(avctx, AV_LOG_WARNING,
               "Forcing thread count to 1 for huffyuv encoding with first pass or context 1\n");
            avctx->thread_count = 1;
        }
    }

    if(!avctx->thread_count) {
        avctx->thread_count = av_cpu_count();
        avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
    }

    if(avctx->thread_count <= 1)
        return 0;

    if(avctx->thread_count > MAX_THREADS)
        return AVERROR(EINVAL);

    av_assert0(!avctx->internal->frame_thread_encoder);
    c = avctx->internal->frame_thread_encoder = av_mallocz(sizeof(ThreadContext));
    if(!c)
        return AVERROR(ENOMEM);

    c->parent_avctx = avctx;

    c->task_fifo = av_fifo_alloc_array(BUFFER_SIZE, sizeof(Task));
    if(!c->task_fifo)
        goto fail;

    pthread_mutex_init(&c->task_fifo_mutex, NULL);
    pthread_mutex_init(&c->finished_task_mutex, NULL);
    pthread_mutex_init(&c->buffer_mutex, NULL);
    pthread_cond_init(&c->task_fifo_cond, NULL);
    pthread_cond_init(&c->finished_task_cond, NULL);

    for(i=0; i<avctx->thread_count ; i++){
        AVDictionary *tmp = NULL;
        void *tmpv;
        AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec);
        if(!thread_avctx)
            goto fail;
        tmpv = thread_avctx->priv_data;
        *thread_avctx = *avctx;
        thread_avctx->priv_data = tmpv;
        thread_avctx->internal = NULL;
        memcpy(thread_avctx->priv_data, avctx->priv_data, avctx->codec->priv_data_size);
        thread_avctx->thread_count = 1;
        thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;

        av_dict_copy(&tmp, options, 0);
        av_dict_set(&tmp, "threads", "1", 0);
        if(avcodec_open2(thread_avctx, avctx->codec, &tmp) < 0) {
            av_dict_free(&tmp);
            goto fail;
        }
        av_dict_free(&tmp);
        av_assert0(!thread_avctx->internal->frame_thread_encoder);
        thread_avctx->internal->frame_thread_encoder = c;
        if(pthread_create(&c->worker[i], NULL, worker, thread_avctx)) {
            goto fail;
        }
    }

    avctx->active_thread_type = FF_THREAD_FRAME;

    return 0;
fail:
    avctx->thread_count = i;
    av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
    ff_frame_thread_encoder_free(avctx);
    return -1;
}

void ff_frame_thread_encoder_free(AVCodecContext *avctx){
    int i;
    ThreadContext *c= avctx->internal->frame_thread_encoder;

    pthread_mutex_lock(&c->task_fifo_mutex);
    c->exit = 1;
    pthread_cond_broadcast(&c->task_fifo_cond);
    pthread_mutex_unlock(&c->task_fifo_mutex);

    for (i=0; i<avctx->thread_count; i++) {
         pthread_join(c->worker[i], NULL);
    }

    pthread_mutex_destroy(&c->task_fifo_mutex);
    pthread_mutex_destroy(&c->finished_task_mutex);
    pthread_mutex_destroy(&c->buffer_mutex);
    pthread_cond_destroy(&c->task_fifo_cond);
    pthread_cond_destroy(&c->finished_task_cond);
    av_fifo_freep(&c->task_fifo);
    av_freep(&avctx->internal->frame_thread_encoder);
}

int ff_thread_video_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet_ptr){
    ThreadContext *c = avctx->internal->frame_thread_encoder;
    Task task;
    int ret;

    av_assert1(!*got_packet_ptr);

    if(frame){
        if(!(avctx->flags & CODEC_FLAG_INPUT_PRESERVED)){
            AVFrame *new = av_frame_alloc();
            if(!new)
                return AVERROR(ENOMEM);
            pthread_mutex_lock(&c->buffer_mutex);
            ret = ff_get_buffer(c->parent_avctx, new, 0);
            pthread_mutex_unlock(&c->buffer_mutex);
            if(ret<0)
                return ret;
            new->pts = frame->pts;
            new->quality = frame->quality;
            new->pict_type = frame->pict_type;
            av_image_copy(new->data, new->linesize, (const uint8_t **)frame->data, frame->linesize,
                          avctx->pix_fmt, avctx->width, avctx->height);
            frame = new;
        }

        task.index = c->task_index;
        task.indata = (void*)frame;
        pthread_mutex_lock(&c->task_fifo_mutex);
        av_fifo_generic_write(c->task_fifo, &task, sizeof(task), NULL);
        pthread_cond_signal(&c->task_fifo_cond);
        pthread_mutex_unlock(&c->task_fifo_mutex);

        c->task_index = (c->task_index+1) % BUFFER_SIZE;

        if(!c->finished_tasks[c->finished_task_index].outdata && (c->task_index - c->finished_task_index) % BUFFER_SIZE <= avctx->thread_count)
            return 0;
    }

    if(c->task_index == c->finished_task_index)
        return 0;

    pthread_mutex_lock(&c->finished_task_mutex);
    while (!c->finished_tasks[c->finished_task_index].outdata) {
        pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
    }
    task = c->finished_tasks[c->finished_task_index];
    *pkt = *(AVPacket*)(task.outdata);
    if(pkt->data)
        *got_packet_ptr = 1;
    av_freep(&c->finished_tasks[c->finished_task_index].outdata);
    c->finished_task_index = (c->finished_task_index+1) % BUFFER_SIZE;
    pthread_mutex_unlock(&c->finished_task_mutex);

    return task.return_code;
}
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Copyright (c) 2012 Michael Niedermayer <michaelni@gmx.at>
	3	*
	4	* This file is part of FFmpeg.
	5	*
	6	* FFmpeg is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2.1 of the License, or (at your option) any later version.
	10	*
	11	* FFmpeg is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with FFmpeg; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include "frame_thread_encoder.h"
	22
	23	#include "libavutil/fifo.h"
	24	#include "libavutil/avassert.h"
	25	#include "libavutil/imgutils.h"
	26	#include "avcodec.h"
	27	#include "internal.h"
	28	#include "thread.h"
	29
	30	#if HAVE_PTHREADS
	31	#include <pthread.h>
	32	#elif HAVE_W32THREADS
	33	#include "compat/w32pthreads.h"
	34	#elif HAVE_OS2THREADS
	35	#include "compat/os2threads.h"
	36	#endif
	37
	38	#define MAX_THREADS 64
	39	#define BUFFER_SIZE (2*MAX_THREADS)
	40
	41	typedef struct{
	42	void *indata;
	43	void *outdata;
	44	int64_t return_code;
	45	unsigned index;
	46	} Task;
	47
	48	typedef struct{
	49	AVCodecContext *parent_avctx;
	50	pthread_mutex_t buffer_mutex;
	51
	52	AVFifoBuffer *task_fifo;
	53	pthread_mutex_t task_fifo_mutex;
	54	pthread_cond_t task_fifo_cond;
	55
	56	Task finished_tasks[BUFFER_SIZE];
	57	pthread_mutex_t finished_task_mutex;
	58	pthread_cond_t finished_task_cond;
	59
	60	unsigned task_index;
	61	unsigned finished_task_index;
	62
	63	pthread_t worker[MAX_THREADS];
	64	int exit;
65	} ThreadContext;
66
67	static void * attribute_align_arg worker(void *v){
68	AVCodecContext *avctx = v;
69	ThreadContext *c = avctx->internal->frame_thread_encoder;
70	AVPacket *pkt = NULL;
71
72	while(!c->exit){
73	int got_packet, ret;
74	AVFrame *frame;
75	Task task;
76
77	if(!pkt) pkt= av_mallocz(sizeof(*pkt));
78	if(!pkt) continue;
79	av_init_packet(pkt);
80
81	pthread_mutex_lock(&c->task_fifo_mutex);
82	while (av_fifo_size(c->task_fifo) <= 0 \|\| c->exit) {
83	if(c->exit){
84	pthread_mutex_unlock(&c->task_fifo_mutex);
85	goto end;
86	}
87	pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
88	}
89	av_fifo_generic_read(c->task_fifo, &task, sizeof(task), NULL);
90	pthread_mutex_unlock(&c->task_fifo_mutex);
91	frame = task.indata;
92
93	ret = avcodec_encode_video2(avctx, pkt, frame, &got_packet);
94	pthread_mutex_lock(&c->buffer_mutex);
95	av_frame_unref(frame);
96	pthread_mutex_unlock(&c->buffer_mutex);
97	av_frame_free(&frame);
98	if(got_packet) {
99	av_dup_packet(pkt);
100	} else {
101	pkt->data = NULL;
102	pkt->size = 0;
103	}
104	pthread_mutex_lock(&c->finished_task_mutex);
105	c->finished_tasks[task.index].outdata = pkt; pkt = NULL;
106	c->finished_tasks[task.index].return_code = ret;
107	pthread_cond_signal(&c->finished_task_cond);
108	pthread_mutex_unlock(&c->finished_task_mutex);
109	}
110	end:
111	av_free(pkt);
112	pthread_mutex_lock(&c->buffer_mutex);
113	avcodec_close(avctx);
114	pthread_mutex_unlock(&c->buffer_mutex);
115	av_freep(&avctx);
116	return NULL;
117	}
118
119	int ff_frame_thread_encoder_init(AVCodecContext avctx, AVDictionary options){
120	int i=0;
121	ThreadContext *c;
122
123
124	if( !(avctx->thread_type & FF_THREAD_FRAME)
125	\|\| !(avctx->codec->capabilities & CODEC_CAP_INTRA_ONLY))
126	return 0;
127
128	if( !avctx->thread_count
129	&& avctx->codec_id == AV_CODEC_ID_MJPEG
130	&& !(avctx->flags & CODEC_FLAG_QSCALE)) {
131	av_log(avctx, AV_LOG_DEBUG,
132	"Forcing thread count to 1 for MJPEG encoding, use -thread_type slice "
133	"or a constant quantizer if you want to use multiple cpu cores\n");
134	avctx->thread_count = 1;
135	}
136	if( avctx->thread_count > 1
137	&& avctx->codec_id == AV_CODEC_ID_MJPEG
138	&& !(avctx->flags & CODEC_FLAG_QSCALE))
139	av_log(avctx, AV_LOG_WARNING,
140	"MJPEG CBR encoding works badly with frame multi-threading, consider "
141	"using -threads 1, -thread_type slice or a constant quantizer.\n");
142
143	if (avctx->codec_id == AV_CODEC_ID_HUFFYUV \|\|
144	avctx->codec_id == AV_CODEC_ID_FFVHUFF) {
145	int warn = 0;
146	if (avctx->flags & CODEC_FLAG_PASS1)
147	warn = 1;
148	else if(avctx->context_model > 0) {
149	AVDictionaryEntry *t = av_dict_get(options, "non_deterministic",
150	NULL, AV_DICT_MATCH_CASE);
151	warn = !t \|\| !t->value \|\| !atoi(t->value) ? 1 : 0;
152	}
153	// huffyuv does not support these with multiple frame threads currently
154	if (warn) {
155	av_log(avctx, AV_LOG_WARNING,
156	"Forcing thread count to 1 for huffyuv encoding with first pass or context 1\n");
157	avctx->thread_count = 1;
158	}
159	}
160
161	if(!avctx->thread_count) {
162	avctx->thread_count = av_cpu_count();
163	avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
164	}
165
166	if(avctx->thread_count <= 1)
167	return 0;
168
169	if(avctx->thread_count > MAX_THREADS)
170	return AVERROR(EINVAL);
171
172	av_assert0(!avctx->internal->frame_thread_encoder);
173	c = avctx->internal->frame_thread_encoder = av_mallocz(sizeof(ThreadContext));
174	if(!c)
175	return AVERROR(ENOMEM);
176
177	c->parent_avctx = avctx;
178
179	c->task_fifo = av_fifo_alloc_array(BUFFER_SIZE, sizeof(Task));
180	if(!c->task_fifo)
181	goto fail;
182
183	pthread_mutex_init(&c->task_fifo_mutex, NULL);
184	pthread_mutex_init(&c->finished_task_mutex, NULL);
185	pthread_mutex_init(&c->buffer_mutex, NULL);
186	pthread_cond_init(&c->task_fifo_cond, NULL);
187	pthread_cond_init(&c->finished_task_cond, NULL);
188
189	for(i=0; i<avctx->thread_count ; i++){
190	AVDictionary *tmp = NULL;
191	void *tmpv;
192	AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec);
193	if(!thread_avctx)
194	goto fail;
195	tmpv = thread_avctx->priv_data;
196	thread_avctx = avctx;
197	thread_avctx->priv_data = tmpv;
198	thread_avctx->internal = NULL;
199	memcpy(thread_avctx->priv_data, avctx->priv_data, avctx->codec->priv_data_size);
200	thread_avctx->thread_count = 1;
201	thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;
202
203	av_dict_copy(&tmp, options, 0);
204	av_dict_set(&tmp, "threads", "1", 0);
205	if(avcodec_open2(thread_avctx, avctx->codec, &tmp) < 0) {
206	av_dict_free(&tmp);
207	goto fail;
208	}
209	av_dict_free(&tmp);
210	av_assert0(!thread_avctx->internal->frame_thread_encoder);
211	thread_avctx->internal->frame_thread_encoder = c;
212	if(pthread_create(&c->worker[i], NULL, worker, thread_avctx)) {
213	goto fail;
214	}
215	}
216
217	avctx->active_thread_type = FF_THREAD_FRAME;
218
219	return 0;
220	fail:
221	avctx->thread_count = i;
222	av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
223	ff_frame_thread_encoder_free(avctx);
224	return -1;
225	}
226
227	void ff_frame_thread_encoder_free(AVCodecContext *avctx){
228	int i;
229	ThreadContext *c= avctx->internal->frame_thread_encoder;
230
231	pthread_mutex_lock(&c->task_fifo_mutex);
232	c->exit = 1;
233	pthread_cond_broadcast(&c->task_fifo_cond);
234	pthread_mutex_unlock(&c->task_fifo_mutex);
235
236	for (i=0; i<avctx->thread_count; i++) {
237	pthread_join(c->worker[i], NULL);
238	}
239
240	pthread_mutex_destroy(&c->task_fifo_mutex);
241	pthread_mutex_destroy(&c->finished_task_mutex);
242	pthread_mutex_destroy(&c->buffer_mutex);
243	pthread_cond_destroy(&c->task_fifo_cond);
244	pthread_cond_destroy(&c->finished_task_cond);
245	av_fifo_freep(&c->task_fifo);
246	av_freep(&avctx->internal->frame_thread_encoder);
247	}
248
249	int ff_thread_video_encode_frame(AVCodecContext avctx, AVPacket pkt, const AVFrame frame, int got_packet_ptr){
250	ThreadContext *c = avctx->internal->frame_thread_encoder;
251	Task task;
252	int ret;
253
254	av_assert1(!*got_packet_ptr);
255
256	if(frame){
257	if(!(avctx->flags & CODEC_FLAG_INPUT_PRESERVED)){
258	AVFrame *new = av_frame_alloc();
259	if(!new)
260	return AVERROR(ENOMEM);
261	pthread_mutex_lock(&c->buffer_mutex);
262	ret = ff_get_buffer(c->parent_avctx, new, 0);
263	pthread_mutex_unlock(&c->buffer_mutex);
264	if(ret<0)
265	return ret;
266	new->pts = frame->pts;
267	new->quality = frame->quality;
268	new->pict_type = frame->pict_type;
269	av_image_copy(new->data, new->linesize, (const uint8_t **)frame->data, frame->linesize,
270	avctx->pix_fmt, avctx->width, avctx->height);
271	frame = new;
272	}
273
274	task.index = c->task_index;
275	task.indata = (void*)frame;
276	pthread_mutex_lock(&c->task_fifo_mutex);
277	av_fifo_generic_write(c->task_fifo, &task, sizeof(task), NULL);
278	pthread_cond_signal(&c->task_fifo_cond);
279	pthread_mutex_unlock(&c->task_fifo_mutex);
280
281	c->task_index = (c->task_index+1) % BUFFER_SIZE;
282
283	if(!c->finished_tasks[c->finished_task_index].outdata && (c->task_index - c->finished_task_index) % BUFFER_SIZE <= avctx->thread_count)
284	return 0;
285	}
286
287	if(c->task_index == c->finished_task_index)
288	return 0;
289
290	pthread_mutex_lock(&c->finished_task_mutex);
291	while (!c->finished_tasks[c->finished_task_index].outdata) {
292	pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
293	}
294	task = c->finished_tasks[c->finished_task_index];
295	pkt = (AVPacket*)(task.outdata);
296	if(pkt->data)
297	*got_packet_ptr = 1;
298	av_freep(&c->finished_tasks[c->finished_task_index].outdata);
299	c->finished_task_index = (c->finished_task_index+1) % BUFFER_SIZE;
300	pthread_mutex_unlock(&c->finished_task_mutex);
301
302	return task.return_code;
303	}