Fix data_size handling for AC3 and dca decoders.
[ffmpeg.git] / libavfilter / vsrc_buffer.c
1 /*
2  * Copyright (c) 2008 Vitor Sessak
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 /**
22  * @file
23  * memory buffer source filter
24  */
25
26 #include "avfilter.h"
27 #include "vsrc_buffer.h"
28 #include "libavutil/imgutils.h"
29
30 typedef struct {
31     int64_t           pts;
32     AVFrame           frame;
33     int               has_frame;
34     int               h, w;
35     enum PixelFormat  pix_fmt;
36     AVRational        time_base;     ///< time_base to set in the output link
37     AVRational        sample_aspect_ratio;
38     char              sws_param[256];
39 } BufferSourceContext;
40
41 int av_vsrc_buffer_add_frame2(AVFilterContext *buffer_filter, AVFrame *frame,
42                               int64_t pts, int width,
43                               int height, enum PixelFormat  pix_fmt,
44                               const char *sws_param)
45 {
46     BufferSourceContext *c = buffer_filter->priv;
47     int ret;
48
49     if (c->has_frame) {
50         av_log(buffer_filter, AV_LOG_ERROR,
51                "Buffering several frames is not supported. "
52                "Please consume all available frames before adding a new one.\n"
53             );
54         //return -1;
55     }
56
57     if(!c->sws_param[0]){
58         snprintf(c->sws_param, 255, "%d:%d:%s", c->w, c->h, sws_param);
59     }
60
61     if(width != c->w || height != c->h || pix_fmt != c->pix_fmt){
62         AVFilterContext *scale= buffer_filter->outputs[0]->dst;
63         AVFilterLink *link;
64
65         av_log(buffer_filter, AV_LOG_INFO, "Changing filter graph input to accept %dx%d %d (%d %d)\n",
66                width,height,pix_fmt, c->pix_fmt, scale && scale->outputs ? scale->outputs[0]->format : -123);
67
68         if(!scale || strcmp(scale->filter->name,"scale")){
69             AVFilter *f= avfilter_get_by_name("scale");
70
71             av_log(buffer_filter, AV_LOG_INFO, "Inserting scaler filter\n");
72             if(avfilter_open(&scale, f, "Input equalizer") < 0)
73                 return -1;
74
75             if((ret=avfilter_init_filter(scale, c->sws_param, NULL))<0){
76                 avfilter_free(scale);
77                 return ret;
78             }
79
80             if((ret=avfilter_insert_filter(buffer_filter->outputs[0], scale, 0, 0))<0){
81                 avfilter_free(scale);
82                 return ret;
83             }
84             scale->outputs[0]->time_base = scale->inputs[0]->time_base;
85
86             scale->outputs[0]->format= c->pix_fmt;
87         } else if(!strcmp(scale->filter->name, "scale")) {
88             snprintf(c->sws_param, 255, "%d:%d:%s", scale->outputs[0]->w, scale->outputs[0]->h, sws_param);
89             scale->filter->init(scale, c->sws_param, NULL);
90         }
91
92         c->pix_fmt= scale->inputs[0]->format= pix_fmt;
93         c->w= scale->inputs[0]->w= width;
94         c->h= scale->inputs[0]->h= height;
95
96         link= scale->outputs[0];
97         if ((ret =  link->srcpad->config_props(link)) < 0)
98             return ret;
99     }
100
101     memcpy(c->frame.data    , frame->data    , sizeof(frame->data));
102     memcpy(c->frame.linesize, frame->linesize, sizeof(frame->linesize));
103     c->frame.interlaced_frame= frame->interlaced_frame;
104     c->frame.top_field_first = frame->top_field_first;
105     c->frame.key_frame = frame->key_frame;
106     c->frame.pict_type = frame->pict_type;
107     c->frame.sample_aspect_ratio = frame->sample_aspect_ratio;
108     c->pts = pts;
109     c->has_frame = 1;
110
111     return 0;
112 }
113
114 int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
115                              int64_t pts)
116 {
117     BufferSourceContext *c = buffer_filter->priv;
118
119     return av_vsrc_buffer_add_frame2(buffer_filter, frame,
120                               pts, c->w,
121                               c->h, c->pix_fmt, "");
122 }
123
124 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
125 {
126     BufferSourceContext *c = ctx->priv;
127     char pix_fmt_str[128];
128     int n = 0;
129
130     if (!args ||
131         (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d", &c->w, &c->h, pix_fmt_str,
132                     &c->time_base.num, &c->time_base.den,
133                     &c->sample_aspect_ratio.num, &c->sample_aspect_ratio.den)) != 7) {
134         av_log(ctx, AV_LOG_ERROR, "Expected 7 arguments, but only %d found in '%s'\n", n, args);
135         return AVERROR(EINVAL);
136     }
137     if ((c->pix_fmt = av_get_pix_fmt(pix_fmt_str)) == PIX_FMT_NONE) {
138         char *tail;
139         c->pix_fmt = strtol(pix_fmt_str, &tail, 10);
140         if (*tail || c->pix_fmt < 0 || c->pix_fmt >= PIX_FMT_NB) {
141             av_log(ctx, AV_LOG_ERROR, "Invalid pixel format string '%s'\n", pix_fmt_str);
142             return AVERROR(EINVAL);
143         }
144     }
145
146     av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s\n", c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name);
147     return 0;
148 }
149
150 static int query_formats(AVFilterContext *ctx)
151 {
152     BufferSourceContext *c = ctx->priv;
153     enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
154
155     avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
156     return 0;
157 }
158
159 static int config_props(AVFilterLink *link)
160 {
161     BufferSourceContext *c = link->src->priv;
162
163     link->w = c->w;
164     link->h = c->h;
165     link->sample_aspect_ratio = c->sample_aspect_ratio;
166     link->time_base = c->time_base;
167
168     return 0;
169 }
170
171 static int request_frame(AVFilterLink *link)
172 {
173     BufferSourceContext *c = link->src->priv;
174     AVFilterBufferRef *picref;
175
176     if (!c->has_frame) {
177         av_log(link->src, AV_LOG_ERROR,
178                "request_frame() called with no available frame!\n");
179         //return -1;
180     }
181
182     /* This picture will be needed unmodified later for decoding the next
183      * frame */
184     picref = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
185                                        AV_PERM_REUSE2,
186                                        link->w, link->h);
187
188     av_image_copy(picref->data, picref->linesize,
189                   c->frame.data, c->frame.linesize,
190                   picref->format, link->w, link->h);
191
192     picref->pts                    = c->pts;
193     picref->video->sample_aspect_ratio = c->frame.sample_aspect_ratio;
194     picref->video->interlaced      = c->frame.interlaced_frame;
195     picref->video->top_field_first = c->frame.top_field_first;
196     picref->video->key_frame       = c->frame.key_frame;
197     picref->video->pict_type       = c->frame.pict_type;
198     avfilter_start_frame(link, avfilter_ref_buffer(picref, ~0));
199     avfilter_draw_slice(link, 0, link->h, 1);
200     avfilter_end_frame(link);
201     avfilter_unref_buffer(picref);
202
203     c->has_frame = 0;
204
205     return 0;
206 }
207
208 static int poll_frame(AVFilterLink *link)
209 {
210     BufferSourceContext *c = link->src->priv;
211     return !!(c->has_frame);
212 }
213
214 AVFilter avfilter_vsrc_buffer = {
215     .name      = "buffer",
216     .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
217     .priv_size = sizeof(BufferSourceContext),
218     .query_formats = query_formats,
219
220     .init      = init,
221
222     .inputs    = (AVFilterPad[]) {{ .name = NULL }},
223     .outputs   = (AVFilterPad[]) {{ .name            = "default",
224                                     .type            = AVMEDIA_TYPE_VIDEO,
225                                     .request_frame   = request_frame,
226                                     .poll_frame      = poll_frame,
227                                     .config_props    = config_props, },
228                                   { .name = NULL}},
229 };