[libav.git] / libav / beosaudio.cpp

/*
 * BeOS audio play interface
 * Copyright (c) 2000, 2001 Fabrice Bellard.
 *
 * This library 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 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>

#include <Application.h>
#include <SoundPlayer.h>

extern "C" {
#include "avformat.h"
}


//const char *audio_device = "/dev/dsp";
const char *audio_device = "beosaudio:";

#define AUDIO_BLOCK_SIZE 4096

typedef struct {
    int fd;
    int sample_rate;
    int channels;
    int frame_size; /* in bytes ! */
    CodecID codec_id;
    int flip_left : 1;
    UINT8 buffer[AUDIO_BLOCK_SIZE];
    int buffer_ptr;
    int pipefd; /* the other end of the pipe */
    BSoundPlayer *player;
    int has_quit; /* signal callbacks not to wait */
} AudioData;

static int own_BApp_created = 0;

/* create the BApplication and Run() it */
static int32 bapp_thread(void *arg)
{
    new BApplication("application/x-vnd.ffmpeg");
    own_BApp_created = 1;
    be_app->Run();
    /* kill the process group */
    kill(0, SIGINT);
    return B_OK;
}

/* called back by BSoundPlayer */
static void audioplay_callback(void *cookie, void *buffer, size_t bufferSize, const media_raw_audio_format &format)
{
    AudioData *s;
    size_t amount;
    unsigned char *buf = (unsigned char *)buffer;

    s = (AudioData *)cookie;
    if (s->has_quit)
        return;
    while (bufferSize > 0) {
        if ((amount = read(s->pipefd, buf, bufferSize)) < B_OK) {
            puts("EPIPE");
            snooze(100000);
            s->player->SetHasData(false);
            return;
        }
        if (amount == 0) {
            snooze(100000);
            s->player->SetHasData(false);
            return;
        }
        buf += amount;
        bufferSize -= amount;
    }
}

static int audio_open(AudioData *s, int is_output)
{
    int p[2];
    int ret;
    media_raw_audio_format format;

    if (!is_output)
        return -EIO; /* not for now */
    ret = pipe(p);
    if (ret < 0)
        return -EIO;
    s->fd = p[is_output?1:0];
    s->pipefd = p[is_output?0:1];
    if (s->fd < 0) {
        perror(is_output?"audio out":"audio in");
        return -EIO;
    }
    /* non blocking mode */
//    fcntl(s->fd, F_SETFL, O_NONBLOCK);
//    fcntl(s->pipefd, F_SETFL, O_NONBLOCK);
    s->frame_size = AUDIO_BLOCK_SIZE;
    format = media_raw_audio_format::wildcard;
    format.format = media_raw_audio_format::B_AUDIO_SHORT;
    format.byte_order = B_HOST_IS_LENDIAN ? B_MEDIA_LITTLE_ENDIAN : B_MEDIA_BIG_ENDIAN;
    format.channel_count = s->channels;
    format.buffer_size = s->frame_size;
    format.frame_rate = s->sample_rate;
    s->player = new BSoundPlayer(&format, "ffmpeg output", audioplay_callback);
    if (s->player->InitCheck() != B_OK) {
        delete s->player;
        s->player = NULL;
        close(s->fd);
        close(s->pipefd);
        return -EIO;
    }
    s->player->SetCookie(s);
    s->player->SetVolume(1.0);
    s->player->Start();
    s->player->SetHasData(true);
    return 0;
}

static int audio_close(AudioData *s)
{
    s->has_quit = 1;
    if (s->player) {
        s->player->Stop();
    }
    if (s->player)
        delete s->player;
    close(s->pipefd);
    close(s->fd);
    return 0;
}

/* sound output support */
static int audio_write_header(AVFormatContext *s1)
{
    AudioData *s = (AudioData *)s1->priv_data;
    AVStream *st;
    int ret;

    st = s1->streams[0];
    s->sample_rate = st->codec.sample_rate;
    s->channels = st->codec.channels;
    ret = audio_open(s, 1);
    if (ret < 0)
        return -EIO;
    return 0;
}

static int audio_write_packet(AVFormatContext *s1, int stream_index,
                              UINT8 *buf, int size, int force_pts)
{
    AudioData *s = (AudioData *)s1->priv_data;
    int len, ret;

    while (size > 0) {
        len = AUDIO_BLOCK_SIZE - s->buffer_ptr;
        if (len > size)
            len = size;
        memcpy(s->buffer + s->buffer_ptr, buf, len);
        s->buffer_ptr += len;
        if (s->buffer_ptr >= AUDIO_BLOCK_SIZE) {
            for(;;) {
snooze(1000);
                ret = write(s->fd, s->buffer, AUDIO_BLOCK_SIZE);
                if (ret != 0)
                    break;
                if (ret < 0 && (errno != EAGAIN && errno != EINTR))
                    return -EIO;
            }
            s->buffer_ptr = 0;
        }
        buf += len;
        size -= len;
    }
    return 0;
}

static int audio_write_trailer(AVFormatContext *s1)
{
    AudioData *s = (AudioData *)s1->priv_data;

    audio_close(s);
    return 0;
}

/* grab support */

static int audio_read_header(AVFormatContext *s1, AVFormatParameters *ap)
{
    AudioData *s = (AudioData *)s1->priv_data;
    AVStream *st;
    int ret;

    if (!ap || ap->sample_rate <= 0 || ap->channels <= 0)
        return -1;

    st = av_new_stream(s1, 0);
    if (!st) {
        return -ENOMEM;
    }
    s->sample_rate = ap->sample_rate;
    s->channels = ap->channels;

    ret = audio_open(s, 0);
    if (ret < 0) {
        av_free(st);
        return -EIO;
    } else {
        /* take real parameters */
        st->codec.codec_type = CODEC_TYPE_AUDIO;
        st->codec.codec_id = s->codec_id;
        st->codec.sample_rate = s->sample_rate;
        st->codec.channels = s->channels;
        return 0;
    }
}

static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt)
{
    AudioData *s = (AudioData *)s1->priv_data;
    int ret;

    if (av_new_packet(pkt, s->frame_size) < 0)
        return -EIO;
    for(;;) {
        ret = read(s->fd, pkt->data, pkt->size);
        if (ret > 0)
            break;
        if (ret == -1 && (errno == EAGAIN || errno == EINTR)) {
            av_free_packet(pkt);
            pkt->size = 0;
            return 0;
        }
        if (!(ret == 0 || (ret == -1 && (errno == EAGAIN || errno == EINTR)))) {
            av_free_packet(pkt);
            return -EIO;
        }
    }
    pkt->size = ret;
    if (s->flip_left && s->channels == 2) {
        int i;
        short *p = (short *) pkt->data;

        for (i = 0; i < ret; i += 4) {
            *p = ~*p;
            p += 2;
        }
    }
    return 0;
}

static int audio_read_close(AVFormatContext *s1)
{
    AudioData *s = (AudioData *)s1->priv_data;

    audio_close(s);
    return 0;
}

AVInputFormat audio_in_format = {
    "audio_device",
    "audio grab and output",
    sizeof(AudioData),
    NULL,
    audio_read_header,
    audio_read_packet,
    audio_read_close,
    NULL,
    AVFMT_NOFILE,
};

AVOutputFormat audio_out_format = {
    "audio_device",
    "audio grab and output",
    "",
    "",
    sizeof(AudioData),
#ifdef WORDS_BIGENDIAN
    CODEC_ID_PCM_S16BE,
#else
    CODEC_ID_PCM_S16LE,
#endif
    CODEC_ID_NONE,
    audio_write_header,
    audio_write_packet,
    audio_write_trailer,
    AVFMT_NOFILE,
};

extern "C" {

int audio_init(void)
{
    /* needed by libmedia */
    if (be_app == NULL) {
        resume_thread(spawn_thread(bapp_thread, "ffmpeg BApplication", B_NORMAL_PRIORITY, NULL));
        while (!own_BApp_created)
            snooze(50000);
    }
    av_register_input_format(&audio_in_format);
    av_register_output_format(&audio_out_format);
    return 0;
}

} // "C"
Commit	Line	Data
dfdfa47c FR	1	/*
	2	* BeOS audio play interface
	3	* Copyright (c) 2000, 2001 Fabrice Bellard.
	4	*
	5	* This library is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU Lesser General Public
	7	* License as published by the Free Software Foundation; either
	8	* version 2 of the License, or (at your option) any later version.
	9	*
	10	* This library is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* Lesser General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU Lesser General Public
	16	* License along with this library; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*/
	19
	20	#include <signal.h>
	21	#include <stdlib.h>
	22	#include <stdio.h>
	23	#include <string.h>
	24	#include <unistd.h>
	25	#include <sys/time.h>
	26
	27	#include <Application.h>
	28	#include <SoundPlayer.h>
	29
	30	extern "C" {
	31	#include "avformat.h"
	32	}
	33
	34
	35	//const char *audio_device = "/dev/dsp";
	36	const char *audio_device = "beosaudio:";
	37
	38	#define AUDIO_BLOCK_SIZE 4096
	39
	40	typedef struct {
	41	int fd;
	42	int sample_rate;
	43	int channels;
	44	int frame_size; /* in bytes ! */
	45	CodecID codec_id;
	46	int flip_left : 1;
	47	UINT8 buffer[AUDIO_BLOCK_SIZE];
	48	int buffer_ptr;
	49	int pipefd; /* the other end of the pipe */
	50	BSoundPlayer *player;
	51	int has_quit; /* signal callbacks not to wait */
	52	} AudioData;
	53
	54	static int own_BApp_created = 0;
	55
	56	/* create the BApplication and Run() it */
	57	static int32 bapp_thread(void *arg)
	58	{
	59	new BApplication("application/x-vnd.ffmpeg");
	60	own_BApp_created = 1;
	61	be_app->Run();
	62	/* kill the process group */
	63	kill(0, SIGINT);
	64	return B_OK;
65	}
66
67	/* called back by BSoundPlayer */
68	static void audioplay_callback(void cookie, void buffer, size_t bufferSize, const media_raw_audio_format &format)
69	{
70	AudioData *s;
71	size_t amount;
72	unsigned char buf = (unsigned char )buffer;
73
74	s = (AudioData *)cookie;
75	if (s->has_quit)
76	return;
77	while (bufferSize > 0) {
78	if ((amount = read(s->pipefd, buf, bufferSize)) < B_OK) {
79	puts("EPIPE");
80	snooze(100000);
81	s->player->SetHasData(false);
82	return;
83	}
84	if (amount == 0) {
85	snooze(100000);
86	s->player->SetHasData(false);
87	return;
88	}
89	buf += amount;
90	bufferSize -= amount;
91	}
92	}
93
94	static int audio_open(AudioData *s, int is_output)
95	{
96	int p[2];
97	int ret;
98	media_raw_audio_format format;
99
100	if (!is_output)
101	return -EIO; /* not for now */
102	ret = pipe(p);
103	if (ret < 0)
104	return -EIO;
105	s->fd = p[is_output?1:0];
106	s->pipefd = p[is_output?0:1];
107	if (s->fd < 0) {
108	perror(is_output?"audio out":"audio in");
109	return -EIO;
110	}
111	/* non blocking mode */
112	// fcntl(s->fd, F_SETFL, O_NONBLOCK);
113	// fcntl(s->pipefd, F_SETFL, O_NONBLOCK);
114	s->frame_size = AUDIO_BLOCK_SIZE;
115	format = media_raw_audio_format::wildcard;
116	format.format = media_raw_audio_format::B_AUDIO_SHORT;
117	format.byte_order = B_HOST_IS_LENDIAN ? B_MEDIA_LITTLE_ENDIAN : B_MEDIA_BIG_ENDIAN;
118	format.channel_count = s->channels;
119	format.buffer_size = s->frame_size;
120	format.frame_rate = s->sample_rate;
121	s->player = new BSoundPlayer(&format, "ffmpeg output", audioplay_callback);
122	if (s->player->InitCheck() != B_OK) {
123	delete s->player;
124	s->player = NULL;
125	close(s->fd);
126	close(s->pipefd);
127	return -EIO;
128	}
129	s->player->SetCookie(s);
130	s->player->SetVolume(1.0);
131	s->player->Start();
132	s->player->SetHasData(true);
133	return 0;
134	}
135
136	static int audio_close(AudioData *s)
137	{
138	s->has_quit = 1;
139	if (s->player) {
140	s->player->Stop();
141	}
142	if (s->player)
143	delete s->player;
144	close(s->pipefd);
145	close(s->fd);
146	return 0;
147	}
148
149	/* sound output support */
150	static int audio_write_header(AVFormatContext *s1)
151	{
152	AudioData s = (AudioData )s1->priv_data;
153	AVStream *st;
154	int ret;
155
156	st = s1->streams[0];
157	s->sample_rate = st->codec.sample_rate;
158	s->channels = st->codec.channels;
159	ret = audio_open(s, 1);
160	if (ret < 0)
161	return -EIO;
162	return 0;
163	}
164
165	static int audio_write_packet(AVFormatContext *s1, int stream_index,
166	UINT8 *buf, int size, int force_pts)
167	{
168	AudioData s = (AudioData )s1->priv_data;
169	int len, ret;
170
171	while (size > 0) {
172	len = AUDIO_BLOCK_SIZE - s->buffer_ptr;
173	if (len > size)
174	len = size;
175	memcpy(s->buffer + s->buffer_ptr, buf, len);
176	s->buffer_ptr += len;
177	if (s->buffer_ptr >= AUDIO_BLOCK_SIZE) {
178	for(;;) {
179	snooze(1000);
180	ret = write(s->fd, s->buffer, AUDIO_BLOCK_SIZE);
181	if (ret != 0)
182	break;
183	if (ret < 0 && (errno != EAGAIN && errno != EINTR))
184	return -EIO;
185	}
186	s->buffer_ptr = 0;
187	}
188	buf += len;
189	size -= len;
190	}
191	return 0;
192	}
193
194	static int audio_write_trailer(AVFormatContext *s1)
195	{
196	AudioData s = (AudioData )s1->priv_data;
197
198	audio_close(s);
199	return 0;
200	}
201
202	/* grab support */
203
204	static int audio_read_header(AVFormatContext s1, AVFormatParameters ap)
205	{
206	AudioData s = (AudioData )s1->priv_data;
207	AVStream *st;
208	int ret;
209
210	if (!ap \|\| ap->sample_rate <= 0 \|\| ap->channels <= 0)
211	return -1;
212
213	st = av_new_stream(s1, 0);
214	if (!st) {
215	return -ENOMEM;
216	}
217	s->sample_rate = ap->sample_rate;
218	s->channels = ap->channels;
219
220	ret = audio_open(s, 0);
221	if (ret < 0) {
222	av_free(st);
223	return -EIO;
224	} else {
225	/* take real parameters */
226	st->codec.codec_type = CODEC_TYPE_AUDIO;
227	st->codec.codec_id = s->codec_id;
228	st->codec.sample_rate = s->sample_rate;
229	st->codec.channels = s->channels;
230	return 0;
231	}
232	}
233
234	static int audio_read_packet(AVFormatContext s1, AVPacket pkt)
235	{
236	AudioData s = (AudioData )s1->priv_data;
237	int ret;
238
239	if (av_new_packet(pkt, s->frame_size) < 0)
240	return -EIO;
241	for(;;) {
242	ret = read(s->fd, pkt->data, pkt->size);
243	if (ret > 0)
244	break;
245	if (ret == -1 && (errno == EAGAIN \|\| errno == EINTR)) {
246	av_free_packet(pkt);
247	pkt->size = 0;
248	return 0;
249	}
250	if (!(ret == 0 \|\| (ret == -1 && (errno == EAGAIN \|\| errno == EINTR)))) {
251	av_free_packet(pkt);
252	return -EIO;
253	}
254	}
255	pkt->size = ret;
256	if (s->flip_left && s->channels == 2) {
257	int i;
258	short p = (short ) pkt->data;
259
260	for (i = 0; i < ret; i += 4) {
261	p = ~p;
262	p += 2;
263	}
264	}
265	return 0;
266	}
267
268	static int audio_read_close(AVFormatContext *s1)
269	{
270	AudioData s = (AudioData )s1->priv_data;
271
272	audio_close(s);
273	return 0;
274	}
275
276	AVInputFormat audio_in_format = {
277	"audio_device",
278	"audio grab and output",
279	sizeof(AudioData),
280	NULL,
281	audio_read_header,
282	audio_read_packet,
283	audio_read_close,
284	NULL,
285	AVFMT_NOFILE,
286	};
287
288	AVOutputFormat audio_out_format = {
289	"audio_device",
290	"audio grab and output",
291	"",
292	"",
293	sizeof(AudioData),
294	#ifdef WORDS_BIGENDIAN
295	CODEC_ID_PCM_S16BE,
296	#else
297	CODEC_ID_PCM_S16LE,
298	#endif
299	CODEC_ID_NONE,
300	audio_write_header,
301	audio_write_packet,
302	audio_write_trailer,
303	AVFMT_NOFILE,
304	};
305
306	extern "C" {
307
308	int audio_init(void)
309	{
310	/* needed by libmedia */
311	if (be_app == NULL) {
312	resume_thread(spawn_thread(bapp_thread, "ffmpeg BApplication", B_NORMAL_PRIORITY, NULL));
313	while (!own_BApp_created)
314	snooze(50000);
315	}
316	av_register_input_format(&audio_in_format);
317	av_register_output_format(&audio_out_format);
318	return 0;
319	}
320
321	} // "C"
322