[vlc-devel] [PATCH 3/3] codec/mmal: Add MMAL-based decoder plugin

[Martin Storsjö]

On Fri, 4 Apr 2014, Julian Scheel wrote:

> From: Dennis Hamester <dennis.hamester at gmail.com>
>
> This plugin is capable of decoding MPEG-2 and H264 video through the Multi
> Media Abstraction Layer (MMAL) by Broadcom. It is supported by recent Broadcom
> SoCs and found on the widely spread Raspberry Pi.
>
> Signed-off-by: Dennis Hamester <dennis.hamester at gmail.com>
> Signed-off-by: Julian Scheel <julian at jusst.de>
> ---
> configure.ac              |  10 +
> modules/codec/Makefile.am |  10 +
> modules/codec/mmal.c      | 566 ++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 586 insertions(+)
> create mode 100644 modules/codec/mmal.c

> +    while (block->i_buffer > 0) {
> +        buffer = mmal_queue_timedwait(sys->input_pool->queue, 2000);
> +        if (!buffer) {
> +            msg_Err(dec, "Failed to retrieve buffer header for input data");
> +            break;
> +        }
> +        mmal_buffer_header_reset(buffer);
> +        buffer->cmd = 0;
> +        buffer->pts = block->i_pts;
> +        buffer->dts = block->i_dts;
> +
> +        len = block->i_buffer;
> +        if (len > buffer->alloc_size)
> +            len = buffer->alloc_size;
> +
> +        memcpy(buffer->data, block->p_buffer, len);
> +        block->p_buffer += len;
> +        block->i_buffer -= len;
> +
> +        buffer->length = len;
> +        buffer->flags = flags;
> +
> +        status = mmal_port_send_buffer(sys->input, buffer);
> +        if (status != MMAL_SUCCESS) {
> +            msg_Err(dec, "Failed to send buffer to input port (status=%"PRIx32" %s)", status, mmal_status_to_string(status));
> +            break;
> +        }
> +    }

Does the decoder support the MP4 NAL format of H264 as well, or is that 
untested and you'd need to reformat that into annex b, as we do in OMX?

// Martin